The initial recovery should normally be done during first few minutes .... this is a newly formatted disk so there isn't any user data there. So, if I run the IO benchmark after say 3-4 min of doing, I should be ok? mdam --create /dev/md0 --raid5.... mount /dev/md0 /mnt/raid mkfs.ext4 /mnt/raid ...wait 3-4 min run IO benchmark... Am I correct? Thanks. On Mon, Apr 11, 2011 at 2:25 AM, Robin Hill <robin@xxxxxxxxxxxxxxx> wrote: > On Mon Apr 11, 2011 at 01:32:34 -0700, Linux Raid Study wrote: >> On Sat, Apr 9, 2011 at 1:50 AM, Robin Hill <robin@xxxxxxxxxxxxxxx> wrote: >> > On Fri Apr 08, 2011 at 05:40:46PM -0700, Linux Raid Study wrote: >> > >> >> What I'm not sure of is if the device is newly formatted, would raid >> >> recovery happen? What else could explain difference in the first run >> >> of IO benchmark? >> >> >> > When an array is first created, it's created in a degraded state - this >> > is the simplest way to make it available to the user instantly. The >> > final drive(s) are then automatically rebuilt, calculating the >> > parity/data information as normal for recovering a drive. >> > >> Thanks. So, the uneven (unequal) distribution of Wrtie/Sec numbers in >> the iostat output are ok...is that correct? >> > If it hadn't completed the initial recovery, yes. ÂIf it _had_ completed > the initial recovery then I'd expect writes to be balanced (barring > any differences in hardware). > > Cheers, >  ÂRobin > -- >   ___ >  Â( ' }   |    Robin Hill    Â<robin@xxxxxxxxxxxxxxx> | >  / / )   Â| Little Jim says ....              Â| > Â// !!    |   Â"He fallen in de water !!"         | > -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
