SAN Boot Implementation and Best Practices Guide ... - IBM Redbooks

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5. Boot into the host server system BIOS or UEFi and disable the on board RAID controller. 6. Configure the HBAs on the hosts to point toward the external storage unit. The HBA BIOS will inform the host that its boot image is now located on the SAN. 7. Install OS onto the appropriate LUN. Here we list the requirements and guidelines for SAN Boot: ► SAN configuration, zoning of boot devices, and multipath configurations ► Active path to boot LUN ► Only one path to the boot LUN enabled, prior to installing and enabling a multipath driver ► HBA BIOS selectable boot, or boot BIOS, must be enabled These general steps can serve as a guide for how to configure SAN Boot. We cover QLogic, Emulex, and iSCSI HBAs in this book. We are covering the configuration setting on the storage subsystems as well. Important: When installing the operating system, you must only have one path to the storage device LUN. Because servers are generally equipped with two HBAs, and because most storage subsystems have two RAID controllers, you must isolate (disconnect) the second HBA or do the appropriate zoning. The boot LUN must be accessible only by the host that is utilizing it to boot, which can be achieved through the use of storage partitioning feature or equivalent on the storage subsystem. 1.8 Storage efficiency and data protection and retention In this section, we introduce some new IBM concepts and features and explain how these features can be merged with the SAN Boot Technology. We cover the following topics: ► Storage efficiency for SAN Boot ► Data protection and retention for SAN Boot 1.8.1 Storage efficiency for SAN Boot In our current environment, customers are being charged with reducing I/T spending as much as possible. Storage infrastructure is one area where traditionally, customers simply bought more storage to deal with demand and never implemented different features or products to optimize their storage infrastructure. Today, according to CIOs, that trend cannot be sustained anymore. Customers must optimize their storage infrastructure to reduce costs or avoid/defer/minimize disk purchases. Every industry needs an optimized storage infrastructure; even in today’s poor economic environment, analysts are reporting storage growth across the board. However, with this storage growth, all industries are looking at ways to do it as efficiently as possible. Here, a highly optimized storage infrastructure can be of help. Using Storage Virtualization, Storage Consolidation and Storage Resource Management (SRM) allows customers in each industry to attend the company's requests and manage their existing storage in a much better way. 14 SAN Boot Implementation and Best Practices Guide for IBM System Storage
The IBM Storage Products Portfolio focuses on providing solutions to help customers address the ever increasing cost pressures they face. This storage family has multiple levels of products to match against the customer's needs. In this section, we present you with some IBM storage products and features, and briefly explain how they can be used for SAN Boot implementation. Automated Tiering feature Automated Tiering (IBM System Storage IBM Easy Tier and IBM Storage Tier Advisor) can monitor data throughput and automate the placement of data across the appropriate drive tiers to optimize current workload requirements. Sharing the same box with different application characteristics and overload, including SAN Boot LUNs, this feature can help to move heavy IOs to different disk pools and prevent downtimes and low performance. This feature allows for the efficient use of solid state drives to increase performance by up to 200% on critical applications. Using this automated feature, you can reduce costs by migrating less critical data to less expensive media and can optimize the labor involved with storage management. Flexible delivery options Consolidated, cloud-based flexible delivery models for storage can help you give your end users control of their storage needs, while improving accountability. It can give departments the ability to provision storage to meet changing demands and developers the ability to set up systems to build and test applications while also maintaining system reliability. This flexibility can help the IT storage manager optimize their storage environment, mixing the technology to better match the user’s request. SAN Boot can benefit from it, especially for critical servers, speeding up their management, security, and capacity. Mixing traditional spinning drives and ultra fast solid-state drives (SSDs) This feature helps support tiered storage environments and consolidation of multiple storage systems onto single storage system. You can mix the SAN Boot LUNs with the Intensive I/O application in the same storage subsystem. Physical capacity upgradeable without system disruption This feature enables capacity upgrades to address the dynamic needs of your business. Depending on your environment, this feature can help you avoid business disruption in your SAN Boot environment. IBM Full Disk Encryption drives IBM FDE drives protect sensitive information from internal or external threats. This feature is intended to be used for servers with critical data and can prevent intrusive copy of data at the storage level. Thin provisioning Thin provisioning makes it possible to optimize the utilization of available storage. Overview Thin provisioning optimizes the utilization of available storage by allocating storage space as needed while improving storage utilization rates significantly. Relating to SAN Boot, thin provisioning can prevent unnecessary cost and have free space available for OS in case of critical and unexpected demands. Chapter 1. Introduction to SAN Boot 15
Page 1: ibm.com/redbooks Front cover SAN Bo
Page 4 and 5: Note: Before using this information
Page 6 and 7: 2.8.4 Creating a host on DS5000 ser
Page 8 and 9: 4.9.2 Activating and installing the
Page 10 and 11: viii SAN Boot Implementation and Be
Page 12 and 13: Trademarks IBM, the IBM logo, and i
Page 14 and 15: Scott Dybas is a Senior Software En
Page 16 and 17: xiv SAN Boot Implementation and Bes
Page 18 and 19: 1.1 What SAN Boot is SAN Boot is a
Page 20 and 21: IBM System Storage devices use pers
Page 22 and 23: 1.5 What switch zoning is Zoning is
Page 24 and 25: 1.6.3 iSCSI HBA A storage unit is a
Page 26 and 27: Using software initiators offers th
Page 28 and 29: 1.7.1 Basic concepts Multiple LUNs
Page 32 and 33: Concepts Thin provisioning provides
Page 34 and 35: 1.8.2 Data protection and retention
Page 36 and 37: 20 SAN Boot Implementation and Best
Page 38 and 39: 2.1 DS5000 overview The DS5000 seri
Page 40 and 41: ► Controller-based software: - St
Page 42 and 43: 4. Select Do not Automatically Star
Page 44 and 45: 8. As shown in Figure 2-7, enter th
Page 46 and 47: 3. Select Planar SAS from the next
Page 48 and 49: 2. Select System Settings from the
Page 50 and 51: 3. Select Configuration Settings as
Page 52 and 53: Figure 2-20 Scan for Fibre Devices
Page 54 and 55: 3. Select Selectable Boot Settings
Page 56 and 57: 7. Verify that all the information
Page 58 and 59: 2. We need to add the second storag
Page 60 and 61: 4. Now enter 1 and press Enter as s
Page 62 and 63: 8. Next we see the storage subsyste
Page 64 and 65: 3. On the next panel, enter 01 and
Page 66 and 67: 2.7.2 Adding a second path to the E
Page 68 and 69: 2. When you click your storage subs
Page 70 and 71: 4. Next we select the RAID level, p
Page 72 and 73: Figure 2-54 Creating the logical dr
Page 74 and 75: 6. After the logical drive is creat
Page 76 and 77: 4. We must now define the host port
Page 78 and 79: 7. You are asked if this host will
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Figure 2-69 Assigning the LUN to th
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2. You can see a window, Manage Hos
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5. Now that you have the second pat
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2. To execute a script on the stora
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5. When the script completes, the r
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2. If the driver is found, it will
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Tip: The rest of the installation p
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2.9.4 Windows 2008 R2 SP1 Multipath
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5. We can also check the volume inf
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2.10.1 Installation steps We are go
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4. After clicking Hard Disks, we cl
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10.We now need to update the SUSE L
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13.When we are in the Boot Loader D
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We are going to install RHEL 5.5 se
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Figure 2-112 Customizing the Softwa
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Tip: Note the name of the new mpp i
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Tip: Make sure that you reboot the
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2.12 FC SAN Boot implementation for
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5. Confirm the ESXi installation by
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3. Verify drive size and click the
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You can find more information about
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5. Clean up the alternate disk volu
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d. Select Activate. The Activate Pa
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Example 2-13 Checking Storage WWPN
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NIM preparations We assume that the
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12.Be sure that the partition alrea
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The output of this comman, as shown
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4. Select your AIX version. The Fix
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3.1 DS8000 overview This section in
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Figure 3-1 IBM System Storage DS880
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Figure 3-3 DS8800 base frame with t
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3.2.3 DS command line interface for
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Select the DS8000 Subsystem and lau
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3.3.1 Fibre Channel architecture Fi
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3.4.2 Downloading and installing a
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3.4.3 BIOS configuration The first
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5. Select Configuration Settings, a
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6. From the Configuration Settings
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11.Change Selectable Boot Settings
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17.During POST, you see QLogic repo
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5. Press Ctrl-E or Alt-E to access
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Figure 3-31 shows the option to ena
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13.A new panel will ask you to sele
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Figure 3-39 Select DVD to install O
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Logical subsystem A logical subsyst
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3. Create the Volume Group to recei
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4. Start your machine and check if
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Figure 3-49 Installing Windows 2008
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e. After rebooting the server, chec
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Redundancy: Avoiding a single point
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12.Choose the Server Base Scenario
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14.Click Partitioning and then Cust
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Figure 3-62 Creating root partition
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19.Click the Install button to init
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3. Edit the /etc/sysconfig/kernel,
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8. Choose the language and click OK
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17.Decide if you want to include ad
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21.After finishing the Red Hat inst
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INITRD_MODULES="processor thermal a
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Implementation possibilities Implem
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5. Clean up the alternate disk volu
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Activating and installing the parti
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2 hdisk17 ...-W50050768014052D1-LA0
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► The NIM server is properly conf
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12.Be sure that the partition alrea
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Example 3-17 mpio_get_config -Av ou
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5. Check the configuration as shown
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11.Confirm the Install options by p
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16.To check the multipaths and the
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Tip: For /var/log, a separate parti
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4.1 Overview The XIV Storage System
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4.2.2 Host FC HBA configuration For
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5. The Adapter Settings menu is dis
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11.Select the boot LUN (in our case
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Figure 4-12 Emulex configuration pa
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7. After the BIOS has been enabled,
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12.After the Boot Entry confirmatio
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However, as seen in Figure 4-23, it
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Zoning guidelines There are many fa
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Important: For the host system to e
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If a new volume is to be created, E
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4.4.4 Assigning an XIV Volume to an
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To perform the same operation from
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Attention: For the installation of
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2. After xpyv is installed, the XIV
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At this point, your Windows host sh
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Figure 4-45 VMware VSphere client:
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For additional XIV considerations,
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Figure 4-49 illustrates the “Prep
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The tool asks for confirmation and
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After the Expert Partitioner panel
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Figure 4-55 displays the default Bo
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Figure 4-57 shows the SUSE Linux En
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Press [ENTER] to proceed. Would you
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Figure 4-59 illustrates how the mul
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Figure 4-61 illustrates the boot lo
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Optional OS packages (iSCSI support
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4.9 Installation of AIX 6.1 for SAN
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ii. By typing 77 two times, you can
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4.9.3 Post operating system install
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The following sections outline some
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Example 4-25 shows the output when
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Figure 4-67 MPIO Policy - Round Rob
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270 SAN Boot Implementation and Bes
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5.1 What storage virtualization is
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SAN Volume Controller offers these
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SAN Volume Controller 2145-8A4 Stor
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Enclosures with 24 slots for 2.5-in
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Figure 5-8 shows the recommended ca
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To log in to an IBM SAN Volume Cont
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The functions used in the SAN Boot
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5.3.1 Considerations before setting
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► Host zone: Create a host zone f
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Attention: To create a system (clus
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Cluster characteristics: ► In SAN
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IBM Storwize V7000 RAID configurati
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Figure 5-16 Available MDisks Tip: A
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After creating storage pools, the f
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Creating a generic volume We choose
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5.4.6 Creating Fiber Channel hosts
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Figure 5-27 Select host-port The dr
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5.4.7 Mapping SAN Boot volume to th
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3. Add the desired WWPN to the righ
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Figure 5-38 Node connectivity Verif
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5.5 Host configuration In this sect
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4. Select Configuration Settings, a
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Figure 5-47 Scan Fibre Devices Tip:
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9. Change Selectable Boot Settings
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During POST, you can see QLogic rep
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2. Select the adapter that you want
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5.5.4 Configuring an Emulex adapter
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Figure 5-66 Scan Fibre Devices Tip:
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12.During post, after Emulex banner
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Tip: Before setting up SAN Boot for
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7. Browse to the source (media) of
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5.7.1 Multipath I/O Figure 5-77 Ins
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4. After the setup completes, you a
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► You can also verify that SDDDSM
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Perform the following steps to migr
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3. Select the Remote volume (2145 f
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Figure 5-91 vSphere Login To manage
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3. You can verify the multipathing
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5.9.1 SAN Boot using SUSE Linux Ent
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6. Set the clock and time zone. Nex
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8. Click the Partitioning link to c
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10.You see a confirmation dialogue
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14.Change the Boot loader to reflec
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16.Click Ok. Now the installer will
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5. Click Next to proceed with the i
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The next window displays additional
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8. Select Review and modify partiti
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10.Select TimeZone and click Next.
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12.Click Next to start the installa
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14.The server will boot off of the
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Example 5-3 multipathd command line
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5.10 SAN Boot for AIX You can SAN B
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8. Select 2 for IPL Configuration M
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12.After the correct IP parameters
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16.Select 2 for Normal Mode Boot, a
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10.Press 5 key to Select Boot Optio
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14.Proceed with Normal Boot, as sho
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3. Press 2 to Change/Show Installat
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7. If you do not see the disk that
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11.Press 1 to start the installatio
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5.10.5 SDDPCM 7. After the system f
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394 SAN Boot Implementation and Bes
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6.1 iSCSI overview The Internet Sma
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6.1.2 iSCSI target 6.1.3 Nodes 6.1.
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6.2 iSCSI and DS5000 storage subsys
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6.4 Step-by-step iSCSI SAN Boot imp
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3. Disable any onboard or internal
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3. From the Fast!UTIL Options windo
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Figure 6-10 Initiator IP Settings 6
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9. Change the Adapter Boot Mode to
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3. You are presented with a panel f
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6. You are presented with a confirm
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c. A wizard will guide you through
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2. Next, we create the host definit
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c. In the next window, we specify t
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Figure 6-30 Select Host type f. Fin
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. In the Define Additional Mapping
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2. From the Add Host Port Identifie
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3. From the Fast!UTIL Options windo
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6.5 Operating system installation A
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4. The next window displays additio
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Figure 6-47 Master Boot Record (MBR
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7. Follow the installation wizard u
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Figure 6-51 SUSE Linux Enterprise S
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5. The next panel displays the iSCS
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Figure 6-56 Installation Settings 8
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Example 6-1 multipathd command line
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Example 6-3 Output of multipath -ll
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6.5.5 Failover/failback verificatio
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multipath -ll output does not show
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Online resources Help from IBM Thes
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discovery order 202 Disk Mirroring
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M Maintenance menu 187 Manage Host
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Switched-fabric 8, 130 switches 286
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SAN Boot Implementation and Best Pr
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