Avago Technologies 3ware SAS 9750-16i4e - Manual (Page 59)

Controller Object Commands
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doing a media scan and reporting an unreadable sectors. (For information
about the initialization process, see the user guide that came with your 3ware
RAID controller.)
Example 1 : Advanced Verify Schedule
When verify is enabled and set to advanced, the show verify command
shows the scheduling as follow:
//localhost> /c1 show verify
Verify Schedule for Controller /c1
Verify Schedule for Controller /c1
========================================================
Slot Day Hour Duration AdvVerify
--------------------------------------------------------
1 Sun 12:00am 24 hr(s) on
2 Mon 12:00am 24 hr(s) on
3 Tue 12:00am 24 hr(s) on
4 Wed 12:00am 24 hr(s) on
5 Thu 12:00am 24 hr(s) on
6 Fri 12:00am 24 hr(s) on
7 Sat 12:00am 24 hr(s) on
Example 2: Basic Verify Schedule
When verify is set to basic, the /cx show verify command shows the basic
verify schedule as illustrated below:
//localhost> /c1 show verify
/c1 basic verify weekly preferred start: Friday 12:00am
/cx show verifymode
The /cx show verifymode shows the current rebuild mode setting of the
specified controller. The verify mode has two settings: Adaptive and Low
latency.
Verify mode works with the verify task rate (see “/cx show verifyrate” on
page 52).
The Adaptive setting is the default verify mode. It allows the firmware to
adjust the interaction of verify tasks with host I/Os to maximize the speed of
both host I/O and verify tasks. The Low Latency setting minimizes latency
(delay) in reading data from a RAID unit by slowing down the verify task
process. For some applications, such as video server applications and audio
applications, it is important to minimize the latency of read commands, so that
users do not perceive a lag when viewing video or listening to audio.