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7
SCSI Drives
The PRIMERGY SX30 storage subsystem can accomodate up to fourteen
1-inch hard disk drives. If it is equipped, e. g. with 146 Gbyte Ultra 160/320 SCSI
drives, approximately 2 Tbyte hard disk memory is available as a maximum
within one housing.
With the one-channel option, all of the fourteen U320 SCSI hard disk drives are
assigned only to this channel, and are accessible via a single node SCSI
module.
With the two-channel option, seven U160/320 SCSI hard disk drives at a time
are assigned to each of the two independend SCSI channels, and are acces-
sible via two single-node SCSI modules in each case, as well as via the dual
node SCSI module.
The SCSI hard disk drives are built into a frame which allows defective drives to
be replaced (hot replacement) or new drives to be added (hot adding) during
operation.
The “Hot Replace“ function can only be performed together with a corre-
sponding RAID configuration. Further information about the RAID configuration
or RAID level can be found in the disk array controller documentation.
A drive may only be replaced if it is inactive (see description of the LEDs in the
table “Meaning of the Status LEDs Indications” on page 25
) or has been marked
as defective in the management tool.
The hot replacement procedure increases the availability of the system
operation and guarantees a high degree of data integrity and protection against
failure.
