U41057-J19-Z146-1-76 July 2004 02–TX150S2–7
General information Description
© Siemens Nixdorf Informationssysteme AG 1995 Pfad: P:\02-systemeinheiten\TX150S2\TX150S2-e\TX150S2-e.k01
Hard disk subsystem
There are two versions of the hard disk subsystem:
–SCSI version
–SATA version
SCSI version
The hard disk subsystem consists of the hard disk cage with up to four ULTRA-
320 SCSI hard disk modules and the SCSI backplane. Each hard disk module
can accommodate a SCSI hard disk drive with a SCA (Single Connector
Attachment) interface and a maximum height of 1 inch. The module is
connected to the SCSI backplane without cables via the SCA interface. This
allows hard disk modules to be simply plugged in or pulled out.
The hard disk subsystem can be controlled by the onboard U320 controller, a
PCI standard SCSI controller or by a SCSI RAID controller.
In the SCSI version it is possible to install a HDD extension box in two bays of
the accessible drives. By this three additional ULTRA-320 SCSI hard disk
modules can be used.
Only if the server is equipped with a RAID controller, a defective hard disk
module can be replaced during operation (hot-plug).
SATA version
The hard disk subsystem consists of the hard disk cage with up to four SATA
hard disk modules and the SATA backplane. Each hard disk module can accom-
modate a SATA hard disk drive with a SATA interface and a maximum height of
1 inch. The module is connected to the SATA backplane without cables via the
SATA interface. This allows hard disk modules to be simply plugged in or pulled
out.
The hard disk subsystem can be controlled by a SATA controller or by a SATA
RAID controller.
Only if the server is equipped with a RAID controller, a defective hard disk
module can be replaced during operation (hot-plug).
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