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14
Installing an R100 disk shelf
Therefore, the 12 drive bays in the disk shelf are labeled between 0 and 15 from
right to left with SCSI addresses 5, 6, and 7 reserved for other internal functions.
The SCSI address labels are shown in the following illustration.
Enclosure services
monitoring
The R100 storage system uses the enclosure services monitoring method to
monitor environmental conditions of the disk shelf. Enclosure services
conditions are communicated to the chassis through the EMU module.
The following table describes the three stages of enclosure services monitoring.
*4,5,6,7 are reserved
15
14
13
12
11
10
9
8
3
2
1
0
Stage
Device
What it does...
1
Chassis
Uses a subset of SCSI-3 commands to monitor the disk
shelf for data related to disk presence, temperature,
power supply units, and fan status.
2
Disk
shelf
The SCSI-ATA bridge requests information from the
EMU.
3
Disk
shelf
The EMU returns the environmental data to the bridge.
4
Disk
shelf
The bridge returns EMU data to the chassis.
Содержание NearStore R100
Страница 6: ...vi Table of Contents...
Страница 20: ...10 Installation rules and restrictions...
Страница 54: ...44 Connecting an R100 chassis to an Ethernet network...
Страница 78: ...68 System messages at startup...
Страница 140: ...130 Replacing the CompactFlash unit subassembly...
Страница 164: ...154 Index...