Mixed Mode (Raid And Jbod Simultaneously); Make Unconfigured Good And Make Jbod; Patrol Read; Striping - HPE Smart Array P824i-p MR Gen10 User Manual

Mixed mode (RAID and JBOD simultaneously)

Mixed mode allows for any drive to be a member of a logical drive (logical volume or RAID volume),
unconfigured and hidden from the operating system, or in a JBOD drive state which exposes the drive to
the host operating system as a physical drive.

Make Unconfigured Good and Make JBOD

When you power down a controller and insert a new drive and if the inserted drive does not contain valid
DDF metadata, the drive status is listed as JBOD (Just a Bunch of Drives) when you power on the system
again. When you power down a controller and insert a new drive and if the drive contains valid DDF
metadata, its drive state is Unconfigured Good. A new drive in the JBOD drive state is exposed to the
host operating system as a standalone drive. You cannot use JBOD drives to create a RAID
configuration, because they do not have valid DDF records. Therefore, you must convert JBOD drives to
unconfigured good drives.
If the controller supports JBOD drives, the MR Storage Administrator includes options for converting
JBOD drives to an unconfigured good drive, or an unconfigured good drive to a JBOD drive.

Patrol read

A patrol read periodically verifies all sectors of the drives connected to a controller, including the system
reserved area in the RAID configured drives. You can run a patrol read for all RAID levels and for all
spare drives. A patrol read is initiated only when the controller is idle for a defined period and has no
other background activities. You can set the patrol read properties and start the patrol read operation, or
you can start the patrol read without changing the properties.
Access the patrol rate by selecting Set Adjustable Task Rate under the More Actions menu then locating
it under the Priority Percentage column. Enter a number from 1 to 100. The higher the number, the faster
the patrol read will occur (and the system I/O rate might be slower as a result).

Striping

RAID 0
A RAID 0 configuration provides data striping, but there is no protection against data loss when a drive
fails. However, it is useful for rapid storage of large amounts of noncritical data (for printing or image
editing, for example) or when cost is the most important consideration. The minimum number of drives
required is one.
The maximum number of drives supported for RAID 0 is 32.
12 Features