Seagate ST39173WC Specifications Page 82

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5-12 Sun StorEdge A1000 and A3x00/A3500FC Best Practices Guide November 2002
5.2.5 Hub
You need to stop all I/O activities to the hub before replacing it. Refer to the FC-100
Hub Installation and Service Manual for further details.
5.2.6 Controller Card Guidelines
With RAID Manager 6.22.1 or patches 109232 and 109233, there are new
NVSRAMs. With a Sun StorEdge A1000, download the NVSRAM after the
controller card is replaced. See FIN I0709.
Note Because controller FRUs come with an NVSRAM, remember to always hot-
swap A3x00/A3500FC controller FRUs to preserve the NVSRAM that exists on the
failed controller. See FIN I0709.
To replace a failed controller board, see Section 6.3.1 in the Sun StorEdge
A3500/A3500FC Controller Module Guide and refer to the Sun StorEdge A3x00
Controller FRU Replacement Guide. Also refer to FIN I0553-1.
Refer to Section 2.6.1, “Cluster Information” on page 2-10 for guidelines when
replacing a controller within a cluster environment.
Note SCSI controller FRUs are factory loaded with a universal firmware that can
be upgraded or downgraded. Make sure to follow the procedures documented in the
Sun StorEdge A3x00 Controller FRU Replacement Guide to download firmware to the
newly replaced controller to match with the supported RAID Manager on the host.
Firmware downgrades on controllers that are not universal FRUs can only be done
through the serial port.
Caution Do not use RAID Manager GUI to downgrade the firmware. Use the
command line to downgrade the firmware.
Caution The possibility of controller “deadlock” exists with certain A3x00 and
RAID Manager 6.1.x configurations. Refer to FIN I0643-01 prior to performing any
firmware upgrade.
For a universal FRU firmware downgrade, you need to load appware first then
bootware. For a firmware upgrade, you need to load bootware first then appware.
There are four different controller FRUs:
SCSI Controller Canister w/Memory (D1000), part number 540-3083
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