help with partitioning - huge stripesize

[Steven Hartland]

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,