Date: Mon, 12 Oct 2015 13:16:59 +0100 From: Steven Hartland <killing@multiplay.co.uk> To: freebsd-stable@freebsd.org Subject: Re: help with partitioning - huge stripesize Message-ID: <561BA4BB.6030507@multiplay.co.uk> In-Reply-To: <20151012134614.0a95076b@efreet.kappastar.com> References: <20151012134614.0a95076b@efreet.kappastar.com>
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As you say using RAID for ZFS is a bad idea, so ideally change the hardware. If not see if your RAID controller has a stripe size option to help or just ignore the warning, its just a warning as it will be non-optimal performance. On 12/10/2015 12:46, Marko Cupać wrote: > Hi, > > I've got HP ProLiant DL320g5p server with HP Smart Array E200 RAID > controller and 4X300Gb SAS disks. > > I'd like to use it for hosting jails on ZFS, but no matter how I create > zpool, I always get a warning about non-native block size: > > block size: 8192B configured, 1048576B native > > I know it is optimal for ZFS to have direct access to disks, but HP > Smart Array E200 apparently does not support JBOD mode. I tried to > configure both single RAID-5 logical volume and four RAID-0 > logical volumes, in both cases diskinfo gives me the following: > > 512 # sectorsize > 299966445568 # mediasize in bytes (279G) > 585871964 # mediasize in sectors > 1048576 # stripesize > 643072 # stripeoffset > 71798 # Cylinders according to firmware. > 255 # Heads according to firmware. > 32 # Sectors according to firmware. > PA6C90R9SXK07P # Disk ident. > > With hardware I have, is it better to create single RAID-5 logical > volume in HP Smart Array E200 and let ZFS think it deals with single > physical drive, or four RAID-0 logical volumes and let ZFS think it > deals with four physical drives? > > Can I just ignore warning about non-native block size? If not, how can > I make it go away? > > Thank you in advance,
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