Hard Disk Drives - IBM xSeries 330 Hardware Maintenance Manual

In the following example, modems are connected to the ASM PCI adapters that are
included with the servers that are connected at each end of the ASM interconnect
network bus. Placing modems at opposite ends of the ASM interconnect network
bus ensures that if an ASM interconnect connection in the bus fails, all of the
systems on the ASM interconnect network have access to a modem to forward
system-management data to the remote system-management administrator. This is
an environment with different models of servers.

Hard disk drives

The server supports two 26 mm (1-inch) slim 3.5-inch hot-swap SCSI hard disk
drives.
Note: You can hot-swap a hard disk drive without interrupting processing and
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Hardware Maintenance Manual: xSeries 330 Type 8675
Modem
ASM
Interconnect
module
Remote
Supervisor
Adapter
xSeries 220
without data loss only if all the following conditions exist.
v The drive is a hot-swappable, SCSI, low voltage differential (LVD) drive
with a single connector attached (SCA) connector
v A SCSI backplane is installed in your system
v A ServeRAID adapter that is configured as RAID 1 is installed in your
system
Remote system
management
Modem
administrator's system
xSeries 350
Modem
xSeries 350
xSeries 350