[mythtv-users] Storage Questions. LVM, RAID, NFS
James C. Dastrup
jc at dastrup.com
Tue May 2 18:55:52 UTC 2006
>On Mon, May 01, 2006 at 03:06:33PM -0500, Dean Wilson wrote:
>> As I understand it from these discussions, Raid5 requires 5 drives, 4
>> of which will be used for storage? (So 5 250GB drives would sum to
>> 1TB of useable HD space?)
>RAID 5 works with 3 or more drives. I'm using 3x160Gb to get 320Gb
>of storage. Using more drives results in less wasted space but
>increases the risk of a dual failure. Most HOWTO type sites suggest
>that once you get to 6 or more drives you should use RAID 6 instead.
Someone is suggesting RAID 6 based on the number of drives in the
array? That's asinine. RAID 6 is basically RAID 5, except with 2
parity writes instead of 1. The only advantage is you can lose 2 drives
instead of 1 and not lose any data, but it is even slower than RAID 5.
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