Manual (PDF) - certon systems GmbH

www.certon.de
the cost. Two hard disks may fail without any data loss occurring.
• Select Volume Capacity ": Here you can enter the desired volume size in gigabytes.
• Greater Two TB Volume Support: Enable this feature if you use a 64bit operating system. Only
64bit operating systems support partitions larger than 2 terabytes.
• "Volume Initialization Mode". Using this function you can control the initialization of the
volume. "Foreground Initialization" means that the volume is only available when it is fully
initialized. This is the fastest. "Background Initialization" means that the initialization occurs in
the background, but the volume is readily available and can be used after a format. However, it
is initially a bit slower because the initialization is running in the background. If the option is not
selectable, you have a RAID level selected, that does not require initialization (such as RAID level
0).
• Using the "Volume Size Stripe" They affect the critical speed of the Gemstone. If you are mostly
small files, so you should choose a small stripe size. Do you work primarily with large files, so
choose a large StripeSize.
• "Volume Cache Mode": Here you can choose between "Write Back" and "Write Through". "Write
Through" turns off the built-in cache of the system and thus slows down the rate appreciably.
"Writeback" uses the gemSTONE’s built in cache.
• Using the "SATA Data Xfer Mode 'you can choose the right protocols for accessing the built-in
hard drives:
o SATA150 should be chosen for older drives though after the SATA I standards were
introduced.
o SATA150 + NCQ should be chosen for older drives (SATA I standard) and utilise Native
Command Queuing. Look at the documentation of the hard drives.
o SATA300 should be chosen for drives that are more modern and to the SATA II standard.
o SATA300 + NCQ should be chosen for drives that are more modern and to the SATA II
standard and utilize Native Command Queuing. Look at the documentation of the hard
drives.
If you have purchased the gemSTONE complete with hard disks please select SATA300 + NCQ.
i
• Channel: Drv #. This association between the channel and allows the assignment of drive letters
that you create volumes on the desired interface.
o SATA (CH0)
Port 0 to 7 : Under this setting, you can reach the volume via the eSATA interface.
Port 8 to 15: Under this setting, you can reach the volume via the USB 3.0 or FireWire 800
port. To choose between these two interfaces you have the right under "System
Controls" -> select "System Config" in the column "USB 3.0 / 1394 Select" the appropriate
interface.
o USBiA (CH1)
To enable USB 2.0 for this volume select one of the ports between 0 and 7. The first
volume, that is to communicate via USB 2.0, must have the port number 0. The second
volume is the port 1 and so on.
To enable iSCSI select a port 8 to 15.
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