Table 5. Features of RAIDXpert2 (Continued) RAIDXpert2 Feature Description Cache Support for Disks
Various disk-caching options are supported: No Cache, Read Ahead
Cache, Write Back Cache, Read Ahead and Write Back Cache.
Note: By default, NVMe Physical disk Read Ahead and Write Back cache are always disabled. User cannot enable the setting as it may impact the operational performance of the NVMe disk Secure Erase
All data on an array can be erased and ensured it is unrecoverable, even
with advanced data recovery techniques.
A Consistency Check is a background operation that verifies and corrects
the mirror or parity data for fault-tolerant disks. It is recommended that a
Consistency Check be run periodically on an array.
With disk roaming, SATA cables can be disconnected from their disks
and shuffled without confusing RAIDXpert2.
Note: Disconnect the SATA cables from the disks only when the system is shutdown. Disk roaming also allows:
• Disks to be moved to different slots in the backplane. RAIDXpert2
detects which disks belong to which arrays, regardless of where the
disks are moved in the backplane.
• Disk(s) to be moved between systems.
Note: It might not be possible to move disks between systems if they contain boot arrays. Fault Tolerance
The following fault tolerance features are available with RAIDXpert2, in
order to prevent data loss in case of a failed disk.
• Disk failure detection (automatic).
• Array rebuild using hot spares (automatic, if the hot spare is
configured for this functionality).
• Hot-swap manual replacement of a disk without rebooting the system
(available only for systems with a backplane that supports hot-
swapping) is not recommend for disks that are part of the Boot
Virtual Disk or are connected to the AMD RAID supported chipsets.
This applies to all chipsets.
For example if a disk fails in a RAID1, the array remains functional and
data is read from the surviving mirrored disk.
A broken mirrored array can be rebuilt after a new disk is inserted and the
disk is designated as a spare. The system does not have to be rebooted.
Multiple RAID Levels per
Support for multiple array levels per disk allows the administrator to
create arrays of different RAID levels using the same disks.