Note:
If an I/O expansion option is installed on any blade server, I/O modules for
that network interface must be installed in I/O-module bays 3 and 4 on the
BladeCenter unit. See “I/O (switch) modules” on page 34 for more information.
Storage-expansion option
Some blade servers have a connector for adding a SCSI expansion unit, such as
the IBM HS20 SCSI Storage Expansion Unit. The storage expansion unit supports
up to two hot-swap SCSI hard disk drives. The expansion option is attached directly
to the blade server.
Note:
The SCSI controller in the SCSI storage expansion unit supports RAID
level-1 (embedded mirroring).
Important:
1. 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.
2. Do not install a drive into IDE connector 2 on the blade server if you intend to
also install an I/O expansion option. The I/O expansion option occupies the
same area as the second IDE drive.
3. Two IDE drives can be used to implement and manage RAID level-1 under both
the Linux and Microsoft Windows 2000 operating systems. Details of the
implementation for Microsoft Windows 2000 can be found at
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q302969 on the World
Wide Web.
42
BladeCenter E Type 8677 and 1881: Hardware Maintenance Manual and Troubleshooting Guide
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