Dell IP4700 Service Guide - Page 59

Abnormal Powerdown, because it first must write the vault disk data to the correct volumes.

Page 59 highlights

Installing an IP4700 2 Abnormal Powerdown If an IP4700 is powered down abnormally (for example, a plug kick or a brownout), data is saved to the storage system vault disks (disks 0 through 8), and is not lost. See Figure 2-20. However, when the IP4700 is powered up again, it will take longer to come on line, because it first must write the vault disk data to the correct volumes. Vault drives for caching Internal code 0 12 3 4 5 6 7 8 9 Figure 2-20 File Server Disk Drives EMC1463 Abnormal Powerdown 2-23

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2
Abnormal Powerdown
2-23
Installing an IP4700
Abnormal Powerdown
If an IP4700 is powered down abnormally (for example, a plug kick
or a brownout), data is saved to the storage system vault disks (disks
0 through 8), and is not lost. See Figure 2-20. However, when the
IP4700 is powered up again, it will take longer to come on line,
because it first must write the vault disk data to the correct volumes.
Figure 2-20
File Server Disk Drives
EMC1463
1
2
3
4
5
6
7
8
9
0
Internal
code
Vault drives for caching