On Mar 15, 2011, at 6:53 PM, Eric Sandeen wrote: > On 3/15/11 5:42 PM, David Shaw wrote: >> Hello, >> >> I understand the need for a proper stride setting when formatting a >> filesystem on a RAID device. However, is there any problem in using >> a stride setting when formatting a filesystem on a regular non-RAID, >> non-SSD, just plain-vanilla-single-disk block device? I'm sure there >> isn't any benefit to it, but I'm curious if there is any harm. >> >> The reason I ask is I'm looking at some code here that can be used on >> either RAID or non-RAID devices. The stride setting it has is >> correct for the particular RAID setup it is intended for, but it also >> uses those settings when formatting a non-RAID device. >> >> David > > just FWIW, recent kernels & e2fsprogs will just automatically pick > stride based on storage geometry - for md/lvm at least, and for > scsi devices that export this geometry as well. > > ext4 has a little stripe-awareness in its allocator; otherwise, stride > just staggers bitmap starts so they don't all end up on the same spindle; [1] > Offhand I don't think it'd cause any harm to set stride on non-raid. Thanks very much for your pointers. It's a nice enhancement that this is done automatically now. David _______________________________________________ Ext3-users mailing list Ext3-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ext3-users
