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Array Type:
JBOD – Just a Bunch of Disks
RAID 0 - Striping
RAID 1 - Mirroring
RAID 5 – Rotating Parity bit
RAID 1/0 – Striping of Mirrored Drives
RAID 6 – Double Parity Bit
Each RAID level has its pros and cons based on the application you use it for (Note: see RAID
level Quick Reference)
Array Name
: the name that will be displayed in Logical Device Information (Default:
RAID_<level>_<array number>)
Initialization Method
: Initialization of a disk sets all data bits to 0, essentially clearing all
the data on the drive. It is important to initialize disks since previous data physically stored on
the drive may interfere with new data.
Keep Old Data: This option skips the initialization process and all data on each physical
disk of the array will be untouched.
Quick Init: This option grants immediate access to the RAID array by skipping the
initialization process, but it will delete all data.
Note:
Skipping initialization is generally
not recommended since residual data on disks may interfere with new data in the
future.
Foreground: The array initialization process will be set at high priority. During this time
array will be non-accessible, but initialization completion time will be shorter.
Background: The array initialization process will have a lower priority. During this time
array will be accessible, but initialization completion time will be longer.
Note
1: Initializing takes a significant amount of time (approximately 2 hours per 1 TB).
Background and Foreground Initialization
Fully initializing the array will completely zero out the data on the disks, meaning the disk will
be completely wiped and every bit on the disk will be set to 0. Foregoing initialization means
the array will still be created, and you can still write new data onto the array. But when your
array requires rebuilding, residual data left behind may interfere with the process.
Cache Policy (Default: Write Back)
Write Back
– Any data written to the array will be stored as cache, resulting in better I/O
performance at the risk of data failures due to power outages. Data will be stored as cache
before it is physically written to the disk; when a power outage occurs, any data in the cache
will be lost.
Write Through
– Data written to an array is directly written onto the disk, meaning lower
write performance for higher data availability. Without cache acting as a buffer, write
performance will be noticeably slower but data loss due to power outages or other failures is
significantly minimized.
Summary of Contents for RocketStor 6314A
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