Yes this Is another thing im weary of... I should have slightly under provisioned at the start or mixed manufacturers... Now i may have to replace 2tb fails with 2.5 for the sake of a block
Sent from my iPhone On 13 Apr 2012, at 17:30, Tim Cook <t...@cook.ms> wrote: > > > On Fri, Apr 13, 2012 at 9:35 AM, Edward Ned Harvey > <opensolarisisdeadlongliveopensola...@nedharvey.com> wrote: > > From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > > boun...@opensolaris.org] On Behalf Of Michael Armstrong > > > > Is there a way to quickly ascertain if my seagate/hitachi drives are as > large as > > the 2.0tb samsungs? I'd like to avoid the situation of replacing all > drives and > > then not being able to grow the pool... > > It doesn't matter. If you have a bunch of drives that are all approx the > same size but vary slightly, and you make (for example) a raidz out of them, > then the raidz will only be limited by the size of the smallest one. So you > will only be wasting 1% of the drives that are slightly larger. > > Also, given that you have a pool currently made up of 13x2T and 5x1T ... I > presume these are separate vdev's. You don't have one huge 18-disk raidz3, > do you? that would be bad. And it would also mean that you're currently > wasting 13x1T. I assume the 5x1T are a single raidzN. You can increase the > size of these disks, without any cares about the size of the other 13. > > Just make sure you have the autoexpand property set. > > But most of all, make sure you do a scrub first, and make sure you complete > the resilver in between each disk swap. Do not pull out more than one disk > (or whatever your redundancy level is) while it's still resilvering from the > previously replaced disk. If you're very thorough, you would also do a > scrub in between each disk swap, but if it's just a bunch of home movies > that are replaceable, you will probably skip that step. > > > You will however have an issue replacing them if one should fail. You need > to have the same block count to replace a device, which is why I asked for a > "right-sizing" years ago. Deaf ears :/ > > --Tim > > >
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