February 2011
Intermediate to advanced
294 pages
11h 53m
English
Content preview from Pro Data Backup and Recovery
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CHAPTER 3 ■ PHYSICAL BACKUP MEDIA
55
total amount of IOPS that are available, regardless of the capacity of the drives, the overall performance
of the disk drive will drop in relation to the amount of excess IOPS that are attempted to be requested.
Because IOPS are independent of the size of the disk, if the performance requirements of a particular
backup or set of backups exceed the maximum IOPS of the RAID group or disk set, the backup will
actually decrease in performance. There is actually a practice called short stroking that does this on a
per-drive basis. The concept is that the outer part of the drive is the fastest because the heads have to
travel the shortest amount due to the physics of how data is written on the drive. The amount ...
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