User`s guide

After the SBB is inserted, its port LED flashes for approximately 15 seconds
and then turns off, unless other configuration errors exist on that port.
Normal operation resumes on the port.
If a new device is added in a previously unused slot, that port’s LED remains
on until the device is added to the controller’s configuration.
If a tape device is placed in a slot where a disk device was previously
installed, the port LED remains on until the tape device is added to the
controller’s configuration. Delete the previously installed disk from the list of
CLI known devices, then add the tape.
4. Close and lock the cabinet doors.
5.9.2 Tape Drive Warm Swap (Removal/Replacement)
The same procedure used to warm swap disk drives also is used for 3½-inch and
5¼-inch tape drive SBBs. Refer to Sections 5.9.1.1 and 5.9.1.2. Some tape drives
cannot be warm swapped.
5.10 When the Quiesce Bus State Is Not Displayed
When a power supply fails in a shelf with only one power supply, the shelf
becomes inactive.
If the bus quiesce LED pattern is not displayed after pushing the appropriate
port button (as described in the warm swap procedure) within a minute or two,
a failed power supply on another shelf within the cabinet may be causing the
problem. This problem must be fixed before restarting the warm swap procedure.
To correct the problem do one of the following:
• Replace the power supply in the failed shelf (or shelves)
• Remove all devices in the failed shelf (or shelves)
• Unplug the SCSI cable within the failed shelf (or shelves)
After one of the corrective actions listed has been completed, wait 2 to 3 minutes
for the controller to observe change. You can then begin using the warm swap
procedure as documented in Sections 5.9.1.1 and 5.9.1.2.
Note
The bus quiesce procedure for warm swap is NOT necessary when
removing or adding devices to a shelf without power.
5.11 Controller Warm Swap Utility (C_SWAP)
Controller warm swap is supported for HSJ array controllers beginning with
HSOF Version 1.4 or later. HSD30 array controllers support controller warm
swap beginning with HSOF Version 2.0 or later. HSZ array controllers support
controller warm swap beginning with HSOF Version 2.5. The controller warm
swap utility is referred to as C_SWAP.
Performing warm swap involves removing one controller, while forcing the other
controller into failover. Because the remaining controller executes failover, it
assumes control of the absent controller’s devices. This minimizes impact to
system performance and downtime.
5–30 Controller Operations