The feature that they removed is not that big of a problem if you are using mdadm to create the array (which is what I do).
See here for more info on this: http://en.wikipedia.org/wiki/Error_recovery_control On Sun, Mar 25, 2012 at 10:26 PM, Andrew J. Kopciuch <akopci...@bddf.ca>wrote: > On March 25, 2012, Royce Souther wrote: > > I have a few file servers that I am using Western Digiatl Green HDD's > with > > LVM. I am not using RAID1 because that would burn out a Green drive very > > quickly. My servers are identical clones of each other and I like that > > better then RAID1 because if a power supply dies the other server keeps > the > > work going until I can get the dead one fixed. > > > > I'm not sure what you mean by "burn out". It depends on the actual drives, > but as I understand it, the draw back from using the WD drives is they do > not > have TLER. That can cause stability (ie. performance degradation) if you > have a nice RAID controller, as it will mark the drive(s) as unreliable > because they are not responsive while fixing read/write errors themselves. > That's only when you have read/write errors ... it's not all the time. > > > I one big issue with LVM is having to unmount the file system to resize > the > > partition. Every time I add a drive and grow the system it takes longer > and > > longer to go through the steps of fsck'ing the partiion and then resizing > > it. It takes most of a day now to do this. ZFS does not have this > problem. > > As I understand it ZFS is able to resize the file system on the fly. > > Mirrored Vdev would be like using RAID1 and that would kill a Green drive > > but just using a ZFS to have the abilty to grow the FS on the file would > be > > good enough and should not hurt the Green drives. Does anyone know if > using > > ZFS not using mirror would be safe to use on drives like these? > > Your gripe is with your filesystem not LVM. > > You might not need to unmount the filesystem to resize it. It depends on a > lot of things. > > XFS & JFS filesystems _have_ to be mounted in order to resize actually. > reiserfs can be either or. For ext filesystems it depends on on the > versions, kernel, and kernel options you have. The utility you want is > ext2online. > > You extend the underlying volume the filesystem is on with lvextend, and > then > extend the filesystem with ext2online. e2fsadm apparently will do both of > those steps in one shot for you. There are some incompatibility issues > between LVM1 & LVM2 utilities apparently > > I've never used ZFS, but it's apparently all-in-one. Manage devices, > volumes, > partitions, FS ... all from the command line with the utilities. > > -- > > If you have brand new servers (meaning not deployed). I'd create your > volumes, and use XFS on top of the volume. You can "convert" the > filesystem > if already deployed, but that seems risky to me ... but should be possible. > > > Andy > > _______________________________________________ > clug-talk mailing list > clug-talk@clug.ca > http://clug.ca/mailman/listinfo/clug-talk_clug.ca > Mailing List Guidelines (http://clug.ca/ml_guidelines.php) > **Please remove these lines when replying >
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