Digital Equipment StorageWorks UltraSCSI DS-BA370 Series, User Manual

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Operating the UltraSCSI Enclosure
UltraSCSI RAID Enclosure 2–19
•
When data is not being transferred, there is no array controller response
to SBB removal.
•
When data is being transferred, the array controller responds to SBB
removal by verifying the data validity.
When you install a replacement device in a configured subsystem, the array
controller ensures that the replacement device type is identical to the one
removed. Only after establishing complete compatibility can the array
controller start configuring the SBB. As part of the configuration process
the array controller will restore all data that was on the original disk.
SBB Failure
The LEDs on the SBBs (Figure 2–6) display the status of the individual
devices. The SBB green device activity LED flashes whenever the SBB is
active.
Figure 2–6 SBB Status LEDs
CXO-4652A-MC
Device
activity
(Green)
Device
fault
(Amber)
Whenever the array controller detects a device error condition it causes the
amber device fault LED to flash. This LED is only O
N
or F
LASHING
when
there is a device malfunction.
For detailed information about the SBB status LEDs, see Chapter 7,
“Storage Devices.”