Duplexing Hard Drives; External Scsi Connector - HP netserver e 800 Service Manual

Chapter 2
Mass Storage Devices
Interface Max Number of
Flexible disk
drive
IDE-1
Ultra SCSI
Adapter
Ultra-2 SCSI
Channel A
Ultra-2 SCSI
Channel B
* The primary IDE (IDE-1) cable is connected to the factory-installed CD-ROM drive. A secondary
IDE connector (IDE-2) is available, but is not supported by Hewlett-Packard.
** A 50 to 68 pin SCSI adapter is provided with the HP Tape Drive.
*** Both SCSI channels (A and B) can each support up to 7 devices; however, there are only enough
internal storage shelves for four hard drives and one optional tape backup device, which is
typically connected to Channel A. Channel B is typically used to control external SCSI devices. If
you decide to duplex internal drives using Channel B, you are restricted to the internal drives only.

Duplexing Hard Drives

You may choose to duplex the drives in the HP NetServer's removable hard disk drive cage (only four drives
possible). The NetServer supports an option to duplex the drives using the embedded dual channel SCSI
controllers (SCSI A and B). There must be at least two SCSI drives available in the hard disk drive cage to
duplex the drives. The NetServer also supports HP's NetRAID 1Si PCI Controller board to control the two
duplexed channels.
CAUTION

External SCSI Connector

The HP NetServer E 800 can be configured to extend one of its SCSI channels (typically channel B) to an
external SCSI connector. This allows connection of additional mass storage devices to the second channel
of the NetServer's embedded controller. It requires a second SCSI cable, HP NetServer E 800
Internal/External SCSI Cable Kit (P/N P1774A).
Devices
1 Factory installed flexible disk drive in (top) shelf 1.
2* Factory installed CD-ROM drive in shelf 2 (Primary IDE connector)
1** Optional SCSI Tape Backup Drive in shelf 3 (address = ID 2)
(optional)
up to 4*** • Factory installed SCSI hard drive in shelf 4 (address = ID 0)
•
Up to three additional SCSI hard disk drives in shelves 5, 6, and
7 of the removable mass storage cage.
•
Optional duplexing of at least two SCSI drives in shelves 4, 5, 6,
and 7.
•
Embedded SCSI controller (address = ID 7)
•
up to 15*** Optional hardware mirroring of up to two SCSI drives in shelves
4, 5, 6, and 7.
•
Optional control of up to 15 external SCSI devices
To prevent damage to the embedded SCSI controller, don't use a HVD (High
Voltage Differential) device.
Installed Devices and Addresses
System Information
11