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Home > Archive > Data Storage > October 2005 > General Question to RAID 5
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General Question to RAID 5
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| Krausse Martin 2005-10-07, 2:47 am |
| Hello, I'm a new user of this newsgroup.
How can tell me, how a RAID 5 knows, that a hard disk drive is
or goes failure? Because, to recover Data with parity checksum, you
must know, what number of hdd is failure!
I don't find any useful information in the www.
Does a RAID System checks the SMART Informations of a HDD
or does he reads out ERROR Register?
Thanks
Martin Krausse
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| Anton Rang 2005-10-10, 5:49 pm |
| Krausse Martin <krausse_martin@freenet.de> writes:
> How can tell me, how a RAID 5 knows, that a hard disk drive is
> or goes failure? Because, to recover Data with parity checksum, you
> must know, what number of hdd is failure!
> I don't find any useful information in the www.
Try searching for the original RAID papers.
> Does a RAID System checks the SMART Informations of a HDD
> or does he reads out ERROR Register?
No, it just tries to read from all the data disks needed for a given
transaction, and if one fails, treats that disk as failed. (It may
try to repair the stripe before assuming total failure.)
-- Anton
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