Digital Equipment Corporation RAID Array 3000 storage subsystem User's Guide Page 42

  • Download
  • Add to my manuals
  • Print
  • Page
    / 94
  • Table of contents
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 41
RAID Array 3000 Pedestal Enclosure
2–14 EK–SMCPO–UG. A01
Figure 2–6 Diagram of RAID 0+1 Write
In the event of a drive failure, a RAID 0+1 array will enter degraded mode and
continue to operate by substituting the failed drive with its mirror.
When the controller creates a RAID 0+1 set, it first sorts the drives by channel
number and SCSI ID. Then it stripes the data across every other drive and forms
a mirrored pair with the first two drives, another mirrored pair with the second
two drives, and so on. Table 2–5 describes how the controller uses the drives in a
RAID 0+1 set.
Table 2–5 RAID 0+1 Example
Drives Selected Function
Channel 1, ID 0 First member of stripe set.
Channel 1, ID 1 Mirror of channel 1, ID 0
Channel 1, ID 2 Second member of stripe set
Channel 2, ID 0 Mirror of channel 1, ID 2
Channel 2, ID 1 Third member of stripe set
Channel 2, ID 2 Mirror of channel 2, ID 1
Page view 41
1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 93 94

Comments to this Manuals

No comments