Answer by Bruno for Is RAID5 more robust than RAID1
I've been thinking a bit about the claim, that RAID-1 should be faster on reads than RAID-5, since it reads across both drives at once.Now, since parity is not read on RAID-5 unless the array needs a...
View ArticleAnswer by carlito for Is RAID5 more robust than RAID1
No common RAID implementation typically checks the parity on data access. I've never seen one. Some RAID5 implementations read parity data for streaming reads to prevent unnecessary seeking (cheaper to...
View ArticleAnswer by Captain Segfault for Is RAID5 more robust than RAID1
Do RAID5 systems check the parity data on reads ?It doesn't really make sense to. What do you do when you find a parity mismatch? (How do you know which block is wrong?)For random reads checking parity...
View ArticleAnswer by duffbeer703 for Is RAID5 more robust than RAID1
RAID-5 is a fault-tolerance solution, not a data-integrity solution. Remember that RAID stands for Redundant Array of Inexpensive Disks. Disks are the atomic unit of redundancy -- RAID doesn't really...
View ArticleAnswer by wfaulk for Is RAID5 more robust than RAID1
I don't know this, but it seems to me unlikely that it does. Remember that in order to calculate the parity, it will have to read the block from all drives in your RAID set and then do math to...
View ArticleAnswer by David Mackintosh for Is RAID5 more robust than RAID1
With RAID-5, parity is generally only read on array rebuild, not on general read. This is so reads can be more random and faster (since you don't have to read and calculate parity for an entire stripe...
View ArticleAnswer by James for Is RAID5 more robust than RAID1
I believe that the answer depends on the controller/software for example it is quite common for mirroring systems to only read one disc out of a pair and therefore be capable of delivering the wrong...
View ArticleAnswer by sybreon for Is RAID5 more robust than RAID1
Personally, I think that the ultimate test of a RAID system is how well it can withstand failure. IN this case, both RAID5 and RAID1 can handle single drive failures but neither will survive any more...
View ArticleAnswer by mrt181 for Is RAID5 more robust than RAID1
afaik, i am no 24/7 storage pro, the controller always checks what is written to and read from the disks. i.e. with raid1 you have slightly worse writes than on a single disk but your reads are a...
View ArticleAnswer by dyasny for Is RAID5 more robust than RAID1
I am about to replace an old hardware RAID5 array with a Linux software RAID1 array. I was talking to a friend and he claimed that RAID5 was more robust than RAID1.That would depend on the raid...
View ArticleAnswer by Ben Quick for Is RAID5 more robust than RAID1
Is your friend talking about the parity bit that is involved in some RAID levels, or the checksum of the data written to disk?If they're on about parity, then RAID1 does not have a parity bit - You...
View ArticleIs RAID5 more robust than RAID1
I am about to replace an old hardware RAID5 array with a Linux software RAID1 array. I was talking to a friend and he claimed that RAID5 was more robust than RAID1.His claim was that with RAID5, on...
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