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Using IBM LTO Ultrium with Open Systems - RS/6000 Home

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<strong>Using</strong> this as an example, under the Files to Read/Download heading, select<br />

Description.<br />

This will take you to a link for the 6227 adapter (specifically,<br />

http://www.rs<strong>6000</strong>.ibm.com/support/micro/df1000f7.html). This site gives details<br />

of:<br />

► Microcode overview<br />

► New microcode availability<br />

► How to determine your adapter microcode level<br />

► How to obtain and update the adapter microcode<br />

We give more information on using SCSI and SAN adapters to attach the <strong>LTO</strong><br />

drives and libraries in Chapter 2, “Basic <strong>LTO</strong> setup for UNIX systems” on page 29<br />

and Chapter 3, “SAN setup” on page 93.<br />

1.4.3 The Integrated SAN Data Gateway Module<br />

The SAN Data Gateway Module, feature code 8005, is an optional feature<br />

available for the 3583 <strong>Ultrium</strong> Scalable Tape Library. If you have this feature<br />

installed, then the drives are internally converted from SCSI to FC, enabling them<br />

to be connected into a SAN <strong>with</strong>out an external gateway.<br />

Refer again to Figure 1-9 on page 20. What if the 3583 has feature number 8005,<br />

the integrated SAN data gateway module? How do you attach your <strong>RS</strong>/<strong>6000</strong><br />

now? Looking at the Web site you’ll see that it calls for either of two adapters,<br />

feature code 6227 or feature 6228. To confirm microcode levels for 6228 use the<br />

same procedure that you used for feature number 6227. Go to the <strong>RS</strong>/<strong>6000</strong><br />

microcode Web site as shown in Figure 1-11.<br />

1.4.4 Determining the number of drives on a SCSI bus<br />

How do you determine how many SCSI drives to place on a host adapter? There<br />

are several factors to take into consideration. Here are a few:<br />

► Tape drive speed capability<br />

►<br />

►<br />

►<br />

►<br />

Disk drive speed capability<br />

Application<br />

– Application needs<br />

– Application characteristics - read/write mix, amount of data transferred,<br />

streaming or stop/start, data block size<br />

Adapter slot availability and capability<br />

Cost of more adapters<br />

Chapter 1. Introduction to <strong>LTO</strong> <strong>Ultrium</strong> <strong>with</strong> UNIX 23

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