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Forum Discussion
Readynas Duo V2 - Raid1 and xRaid2
I've been reading through a few posts here and the documentation(RAIDiator 5.3 SW Manual_3Jul12.pdf) and have a few questions about how to setup my RAID. I have a Duo V2 which means I have a maximu...
Hi all.
Sorry to re-open this post, but I have the same question as talkingduck started out with reg. RAID1 vs. X-RAID2, and I am confused by the "RAIDiator 5.3 SW Manual_5Sep12.pdf"-manual. On page 20, last paragraph in said manual, it is disclosed that
"X-RAID2 uses the first disk to store data, and the second disk to store parity information that allows it to re-create data if a disk fails in this two-disk system, the usable storage space is one disk. In a three-disk system, the usable storage space is two disks, and in a four-disk volume, the usable storage space is three disks."
Therefore, to a non-skilled person as myself, RAID1 seems to give better protection than X-RAID2 in case of a failing disk because as described by talkingduck, using RAID1 I would have two identical disks. In X-RAID2 I would have a data disk and a parity disk; and if the data disk fails I only have the parity disk?!?
Thus, could someone please explain whether X-RAID2 with two disks provides RAID1 protection or not? And please elaborate:-) Because said paragraph, in my view, indicates X-RAID2 provides a lower level of protection than RAID1.
Best regards
CJ
Sorry to re-open this post, but I have the same question as talkingduck started out with reg. RAID1 vs. X-RAID2, and I am confused by the "RAIDiator 5.3 SW Manual_5Sep12.pdf"-manual. On page 20, last paragraph in said manual, it is disclosed that
"X-RAID2 uses the first disk to store data, and the second disk to store parity information that allows it to re-create data if a disk fails in this two-disk system, the usable storage space is one disk. In a three-disk system, the usable storage space is two disks, and in a four-disk volume, the usable storage space is three disks."
Therefore, to a non-skilled person as myself, RAID1 seems to give better protection than X-RAID2 in case of a failing disk because as described by talkingduck, using RAID1 I would have two identical disks. In X-RAID2 I would have a data disk and a parity disk; and if the data disk fails I only have the parity disk?!?
Thus, could someone please explain whether X-RAID2 with two disks provides RAID1 protection or not? And please elaborate:-) Because said paragraph, in my view, indicates X-RAID2 provides a lower level of protection than RAID1.
Best regards
CJ
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