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Exact setup SW raid 10 But Low I/o
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Exact setup SW raid 10 But Low I/o

TazTaz Member
edited June 2012 in General

2 server, Exact setup+ hard drive+ SW Raid 10 4HD

Server -A: dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync = 160MB/s
Server-B: dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync = 90MB/s
mdstat shows Raid as active. Any idea what might have been happening?

This week is not my week. Too many funny error.

Comments

  • avelineaveline Member, Patron Provider

    Perhaps it's your hard disk 's fault..

  • TazTaz Member

    @aveline said: Perhaps it's your hard disk 's fault.

    Hope not. Brand new Disk's :(

  • @NinjaHawk said: Server -A: dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync = 160MB/s

    Server-B: dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync = 90MB/s
    mdstat shows Raid as active. Any idea what might have been happening?

    Same BIOS setup? DD being done on a volume within the RAID? Chunk sizes/stripe size/readahead all the same?

  • TazTaz Member

    yes. Exact config. Doing another install. Lets see how it comes out.

  • rds100rds100 Member
    edited June 2012

    hdparm -tT each individual drive and compare the read speeds. Any differences?

  • miTgiBmiTgiB Member

    What is the output of cat /proc/mdstat on each machine?

  • CoreyCorey Member

    I think he already opted to a reinstall so we won't be able to troubleshoot this error for him. First step should probably be to check the SMART data on all the drives.

  • TazTaz Member

    I will update you soon.
    BTW during Kickstart I got this: with error mdadm exited with status 127- any one have any update on this? i do not have redhat sub so can not see a damn thing over there and it is bugging like hell.

  • TazTaz Member

    @corey smart shows up everything fine. I am simply re-installing to see if I messed up somewhere else.

  • @NinjaHawk said: I will update you soon.

    BTW during Kickstart I got this: with error mdadm exited with status 127- any one have any update on this? i do not have redhat sub so can not see a damn thing over there and it is bugging like hell.

    Partitions Ext4? How are you setting them up? Beforehand or in Anaconda?

  • TazTaz Member

    Anaconda. Ext4 and Ext3 same error.

  • TazTaz Member

    Issue fixed. Bad partioning. After re-install fixed everything. Feels so good. Off to Grimaldis Pizza any one from NYC want to meet up?

  • CoreyCorey Member

    So weird. - If i were in NYC I would.

  • TazTaz Member

    Ya I know.
    @corey if you ever pass by, hit me up. Grimaldis has the best pizza sir.

  • Heading to NYC in July.

  • TazTaz Member

    Where in?>

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