IBM HS40 - BladeCenter - 8839, Maintenance And Troubleshooting Manual, Page: 62 / 172

To use SCSI hard disk drives with your blade server, install a SCSI storage
expansion unit, such as the IBM BladeCenter SCSI Storage Expansion Unit, on the
blade server. You will then be able to install two 3.5-inch, hot-swap, SCSI, 1-inch
(26 mm) slim-high hard disk drives in the expansion unit, for use by the blade
server. The SCSI controller in the BladeCenter SCSI storage expansion unit
supports embedded mirroring, which is similar to RAID level-1.
Important: To avoid potential performance and reliability problems when
configuring or replacing drives in a mirrored configuration, make sure
that the storage capacities and speeds of the drives are identical.
After you install the SCSI storage expansion unit on your blade server, the blade
server and expansion unit are a unit that occupies three blade bays in the
BladeCenter unit.
Attention: To ensure proper cooling and system reliability, make sure that each of
the SCSI hard disk drive bays on the SCSI storage expansion unit contains either a
hot-swap SCSI hard disk drive or a filler panel.
Complete the following steps to install the SCSI storage expansion unit.
Note: The illustrations used in this procedure depict the installation process on a
BladeCenter HS40 blade server in a BladeCenter Type 8677 unit. These
illustrations might differ slightly from your hardware. However, this installation
process is the same regardless of the BladeCenter unit.
1. Review the safety information beginning on page 109 and “Installation
guidelines” on page 33.
2. Shut down the operating system, turn off the blade server, and remove the
blade server from the BladeCenter unit (see “Removing the blade server from
the BladeCenter unit” on page 39 for instructions).
3. Carefully lay the blade server on a flat, nonconductive surface.
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BladeCenter HS40 Type 8839: Hardware Maintenance Manual and Troubleshooting Guide