Avago Technologies 3ware SAS 9750-16i4e - Manual (Page 54)

Chapter 2. CLI Syntax Reference
46 3ware SATA+SAS RAID Controller Card CLI Guide, Version 10.2
/cx show rebuild
Background tasks can be scheduled to run at times that are most convenient
for your organization.
Rebuild is one of the supported background tasks. Migrate and initialize are
other background tasks that follow the same schedule as rebuild. Other
background tasks for which there are separate schedules are verify and
selftest. For each background task, up to seven time periods can be registered,
known as slots 1 through 7. You can manage each task schedule with a set of
commands including add, del, show and set a task. Background task
schedules have a slot ID, start-day-time, duration, and status attributes.
For details about setting up a schedule for background rebuild tasks, see
“Setting Up a Rebuild Schedule” on page 60.
Rebuild activity attempts to (re)synchronize all members of redundant units
such as RAID 1, RAID 10, RAID 5, RAID 6, and RAID 50. You can start a
rebuild manually, or it can start automatically if a spare has been defined.
Scheduled rebuilds occur during the scheduled time slot, if the schedules are
enabled. For in-depth information about rebuild and other background tasks,
see “About Background Tasks” in the 3ware SATA+SAS RAID Controller
Card Software User Guide, Version 10.2.
The /cx show rebuild command shows the current rebuild background task
schedule, as illustrated below.
//localhost> /c0 show rebuild
Rebuild Schedule for Controller /c0
========================================================
Slot Day Hour Duration Status
--------------------------------------------------------
1 Mon 2:00pm 10 hr(s) disabled
2 Thu 7:00pm 18 hr(s) disabled
3 - - - disabled
4 - - - disabled
5 - - - disabled
6 Mon 1:00am 4 hr(s) disabled
7 Sun 12:00am 1 hr(s) disabled
A status of “disabled” indicates that the task schedule is disabled. In this case,
the controller does not use the defined schedule timeslots. If you start the
command manually, rebuilding starts within 10 to 15 minutes. Otherwise it
begins automatically if a rebuild is needed and a proper spare drive is set up or
if the auto rebuild feature is turned on and a suitable unconfigured drive is
available.
If the rebuild schedule is enabled while a rebuild process is underway, the
rebuild pauses until a scheduled time slot.