Did that, no effect. Building a RAID10 array of 14 10K disks (including two hot spares, so really 12 disks) on the same controller (different channel, not at the same time as the RAID5 rebuild) gives ~130,000 KB/sec.<br><br>
<div class="gmail_quote">On Thu, May 19, 2011 at 1:57 PM, Gerald Brandt <span dir="ltr"><<a href="mailto:gbr@majentis.com">gbr@majentis.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div><div style="font-family:Times New Roman;font-size:10pt;color:#000000">Linux has speed limits on rebuilds, check<br><br><br><span style="border-collapse:separate;color:rgb(0, 0, 0);font-family:'Times New Roman';font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-size:medium"><span style="color:rgb(51, 51, 51);font-family:'Lucida Console','courier new',monospace;font-size:11px;font-weight:500;line-height:16px;text-align:left;white-space:pre-wrap">/proc/sys/dev/raid/speed_limit_max<br>
/proc/sys/dev/raid/speed_limit_min<br><br>and echo new values into there.<br><br>Gerald<br></span></span><br><hr><blockquote style="border-left:2px solid rgb(16, 16, 255);margin-left:5px;padding-left:5px;color:rgb(0, 0, 0);font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt">
<div><div></div><div class="h5">I installed Ubuntu Server 10.04.2 LTS AMD64 on a HP ProLiant ML370 G3 (4 x dual-core/hyperthreaded Xeon 2.66 GHz, 8 GB RAM) and I used the on-board SCSI controller to manage 8 x 300 GB 15K RPM SCSI drives in a software RAID 5 set up as a 7-drive array with 1 hot-spare drive. All drives are the exact same model with the same firmware version.<div>
<br></div><div>It's currently rebuilding the array (because I just created the array) and /proc/mdstat is reporting "finish=165.7min speed=25856K/sec". Does that sound "right" in the sense that it's the right order of magnitude? I though it should be higher, but I haven't set up such an array before, so I don't have anything to compare it to.</div>
<div><br></div><div>If it's slow, does anyone have a suggestion for speeding it up?</div><div><br></div><div>Kevin</div>
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