On 9/6/07, Diego Righi <[EMAIL PROTECTED]> wrote: > ...anyway I wanted to make it the most silent I could, so I suspeded all the > 10 disks Warning: unfounded speculation ahead.
I've heard that this can cause performance issues and undue wear on the drive. The reasoning is that since the arm assembly accelerates in one direction, and there's not much force keeping the drive from rotating, it spins in the opposite direction a little bit. This isn't a huge problem by itself, but since the place the arm was aiming for is no longer there due to the counter-rotation, it has to seek a little bit in the other direction, generating more wear and tear on the bearings, more heat from the drive, and shorter drive lifetimes. I haven't seen any data to back this up or otherwise, but it does make some sense to me. The distance between tracks on a modern disk is ludicrously small - on the order of microns - so any small influence on where the head ends up seems likely to result in getting the wrong location and having to relocate. That said, it looks like quite a nice setup. Good choice on components, even if the memory isn't ECC ;-) Will _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
