Chapter 2 installation – Grass Valley PRS 250 RAID Storage System User Manual
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Chapter 2 Installation
2-12
RAID Instructions
Setting an SP’s SCSI ID
The Profile will support two separate external file systems. The RAID Storage chassis
is an external attachment which can be assigned SCSI IDs 8 through 15.
If the RAID units are configured as two external file systems, the first unit or pair of
units of the second file system must be set to SCSI ID 12. If only a single RAID is to
be used, it should be assigned the lowest SCSI ID available. See the following two
examples.
EXAMPLE 1: Two RAIDs daisy-chained to a Profile with a single external SCSI
bus would have SCSI IDs 8 & 9.
EXAMPLE 2: Six RAIDs attached to a Profile with two external SCSI buses
(three daisy-chained RAIDs to each bus) would have SCSI IDs 8, 9, & 10 on each
bus.
NOTE: RAID units should be attached symmetrically to the two buses (that is, the
same number of RAIDs on each bus with the same number of disk modules in each
chain).
ID 0
ID 1
ID 2
ON
ID 3
ID 0
ID 1
ID 2
ID 3
SP B
SCSI ID
SP A
SCSI ID
Back of storage chassis
SCSI ID
Switch number
number
ID 0
ID 1
ID 2
ID 3
0
On
On
On
On
1
Off
On
On
On
2
On
Off
On
On
3
Off
Off
On
On
4
On
On
Off
On
5
Off
On
Off
On
6
On
Off
Off
On
7
Off
Off
Off
On
8
On
On
On
Off
9
Off
On
On
Off
10
On
Off
On
Off
11
Off
Off
On
Off
12
On
On
Off
Off
13
Off
On
Off
Off
14
On
Off
Off
Off
15
Off
Off
Off
Off