Dell IP4700 Service Guide - Page 58

loss. When that happens, volumes become inaccessible and

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Installing an IP4700 2 for the light to go off and the fans to stop before proceeding with further service to the storage system. ! CAUTION Never remove the fan pack and shut off the power supply to shut down an IP4700. Doing so effectively bypasses the SPS, and write cache data cannot be saved to the vault drives, which results in data loss. When that happens, volumes become inaccessible and the unsolicited event log displays an error message similar to: "Enclosure 0 Disk 5 0x90a (Can't Assign - Cache Dirty) 0 0xafb40 0x14362c." Contact your service provider if this situation occurs. 2-22 IP4700 Installation and Service Guide

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2
2-22
IP4700 Installation and Service Guide
Installing an IP4700
for the light to go off and the fans to stop before proceeding with
further service to the storage system.
CAUTION
!
Never remove the fan pack and shut off the power supply to shut
down an IP4700. Doing so effectively bypasses the SPS, and write
cache data cannot be saved to the vault drives, which results in data
loss. When that happens, volumes become inaccessible and the
unsolicited event log displays an error message similar to:
“
Enclosure 0 Disk 5 0x90a (Can’t Assign - Cache
Dirty) 0 0xafb40 0x14362c.
”
Contact your service provider if this situation occurs.