Running RAID in a Fedora System

Hans Müller ndof at gmx.li
Mon Dec 8 09:35:52 UTC 2003


Am Montag 08 Dezember 2003 02:45 schrieb Xose Vazquez Perez:
> Allan Metts wrote:
> > This is an Adaptec AAA-133U2, apparently part of Adaptec's "Array 1000"
> > family.
> >
> > --*-- Anyone see any issues with this controller and Fedora support?
>
> is it an aacraid board ?
>
> > --*-- It sounds like the general consensus is that, with five disks, I
> > should use RAID 0/1 with a hot spare -- provided I can live without 60%
> > of my disk space.  If not, use RAID 5.  Everyone agree?
>
> raid 10 or 01 = 1/2 of total storage
> raid 5 = total_storage - 1_disk
>
> but raid 5 only supports a failure in *one* disk, and the rebuild of the
> raid is _very_ slow. There is big degradation if one disk is broken.
> Raid 10 can supports 2 failures in differents set of raid_1 and degradation
> with 1 disk bad is less than raid5.
>
tht is not correct. when one disk in each arry fail the all data are lost. 
only 2 disk or more in the same arry can fail.





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