comment at the bottom... Tim wrote: > On Sun, Jan 18, 2009 at 1:56 PM, Eric D. Mudama > <edmud...@bounceswoosh.org <mailto:edmud...@bounceswoosh.org>> wrote: > > On Sun, Jan 18 at 13:43, Tim wrote: > > You look at the size of the drive and you take a set percentage > off... If > it's a "LUN" and it's so far off it still can't be added with the > percentage that works across the board for EVERYTHING ELSE, you > change the > size of the LUN at the storage array or adapter. > > I know it's fun to pretend this is rocket science and > impossible, but the > fact remains the rest of the industry has managed to make it > work. I have > a REAL tough time believing that Sun and/or zfs is so deficient > it's an > insurmountable obstacle for them. > > > If, instead of having ZFS manage these differences, a user simply > created slices that were, say, 98% as big as the average number of > sectors in a XXX GB drive... would ZFS enable write cache on that > device or not? > > I thought I'd read that ZFS didn't use write cache on slices because > it couldn't guarantee that the other slices were used in a > write-cache-safe fashion, would that apply to cases where no other > slices were allocated? > > > It will disable it by default, but you can manually re-enable it. > That's not so much the point though. ZFS is supposed to be > filesystem/volume manager all-in-one. When I have to start going > through format every time I add a drive, it's a non-starter, not to > mention it's a kludge.
DIY. Personally, I'd be more upset if ZFS reserved any sectors for "some potential swap I might want to do later, but may never need to do." If you want to reserve some space for swappage, DIY. As others have noted, this is not a problem for systems vendors because we try, and usually succeed, at ensuring that our multiple sources of disk drives are compatible such that we can swap one for another. -- richard _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
