Bosch CIP-5316-JBOD, User Manual

Page: 55 / 68

CIP5000 series storage Disk arrays and logical drives | en 55
Bosch Security Systems B.V. User manual 2019-10 | V01 | F.01U.380.030
Disk Array operational status
– OK - This is the normal state of the logical drive. When the logical drive is operating
properly, it is ready for immediate use. For RAID Levels other than RAID 0, the logical
drive has full redundancy.
– Synchronizing - This condition is temporary. Synchronizing is a maintenance function that
verifies the integrity of data and redundancy in the logical drive. When the logical drive is
synchronizing, it keeps operating and the data is available. However, access is slower due
to the synchronizing operation.
– Critical / Degraded - This condition occurs due to the failure of the physical drive. The
degraded logical drive keeps operating and the data is still available. However, the logical
drive has lost redundancy (fault tolerance). You shall identify the cause of the problem
and correct it.
– Rebuilding - This condition is temporary. When the physical drive has been replaced, the
logical drive automatically starts rebuilding in order to restore redundancy (fault
tolerance). When the logical drive is rebuilding, it keeps operating and the data is
available. However, access is slower due to the rebuilding operation.
17.1 Logical drive management
Logical drives derive from disk arrays. In the tree view, you can see the icons for the logical
drives that belong to each array. You can access the logical drive list in the tree view by
expanding the disk array, and clicking the logical drive icon for any existing disk array, or
simply clicking the subsystem's Logical Drive Summary icon.
Click on any logical drive (LD) in the list to view information and statistics, to change settings
(Alias, Read Policy, Write Policy), to start background activities (Initialization, Redundancy
Check), or to view the LD checklist.
Information displayed in the menu includes:
–
Logical Drive ID
– Alias
– Raid Level
– Operational Status
– Capacity
– Physical Capacity
– Number of Axles [#]
– Number of Used Physical Drives [#]
– Stripe Size
– Sector Size [Bytes]
– Disk Array ID
– Read Policy
– Write Policy
– Current Write Policy
– Serial Number
– WWN
– Synchronized [Yes/No]
– Tolerable Number of Dead Drives Per Axle
– Parity Pace
– Codec Scheme