Re: [zfs-discuss] Best controller card for 8 SATA drives ?

[Erik Ableson]

The problem I had was with the single raid 0 volumes (miswrote RAID 1  
on the original message)

This is not a straight to disk connection and you'll have problems if  
you ever need to move disks around or move them to another controller.

I agree that the MD1000 with ZFS is a rocking, inexpensive setup (we  
have several!) but I'd recommend using a SAS card with a true JBOD  
mode for maximum flexibility and portability. If I remember correctly,  
I think we're using the Adaptec 3085. I've pulled 465MB/s write and  
1GB/s read off the MD1000 filled with SATA drives.

Cordialement,

Erik Ableson

+33.6.80.83.58.28
Envoyé depuis mon iPhone

On 23 juin 2009, at 21:18, Henrik Johansen <hen...@scannet.dk> wrote:

Kyle McDonald wrote:
Erik Ableson wrote:

Just a side note on the PERC labelled cards: they don't have a  
JBOD mode so you _have_ to use hardware RAID. This may or may not  
be an issue in your configuration but it does mean that moving  
disks between controllers is no longer possible. The only way to  
do a pseudo JBOD is to create broken RAID 1 volumes which is not  
ideal.

It won't even let you make single drive RAID 0 LUNs? That's a shame.

We currently have 90+ disks that are created as single drive RAID 0  
LUNs
on several PERC 6/E (LSI 1078E chipset) controllers and used by ZFS.

I can assure you that they work without any problems and perform very
well indeed.

In fact, the combination of PERC 6/E and MD1000 disk arrays has worked
so well for us that we are going to double the number of disks during
this fall.

The lack of portability is disappointing. The trade-off though is  
battery backed cache if the card supports it.

-Kyle


Cordialement,

Erik Ableson

+33.6.80.83.58.28
Envoyé depuis mon iPhone

On 23 juin 2009, at 04:33, "Eric D. Mudama" <edmud...@bounceswoosh.org 
> wrote:

> On Mon, Jun 22 at 15:46, Miles Nordin wrote:
>>>>>>> "edm" == Eric D Mudama <edmud...@bounceswoosh.org> writes:
>>
>>  edm> We bought a Dell T610 as a fileserver, and it comes with an
>>  edm> LSI 1068E based board (PERC6/i SAS).
>>
>> which driver attaches to it?
>>
>> pciids.sourceforge.net says this is a 1078 board, not a 1068  
board.
>>
>> please, be careful.  There's too much confusion about these  
cards.
>
> Sorry, that may have been confusing.  We have the cheapest storage
> option on the T610, with no onboard cache.  I guess it's called  
the
> "Dell SAS6i/R" while they reserve the PERC name for the ones with
> cache.  I had understood that they were basically identical  
except for
> the cache, but maybe not.
>
> Anyway, this adapter has worked great for us so far.
>
>
> snippet of prtconf -D:
>
>
> i86pc (driver name: rootnex)
>    pci, instance #0 (driver name: npe)
>        pci8086,3411, instance #6 (driver name: pcie_pci)
>            pci1028,1f10, instance #0 (driver name: mpt)
>                sd, instance #1 (driver name: sd)
>                sd, instance #6 (driver name: sd)
>                sd, instance #7 (driver name: sd)
>                sd, instance #2 (driver name: sd)
>                sd, instance #4 (driver name: sd)
>                sd, instance #5 (driver name: sd)
>
>
> For this board the mpt driver is being used, and here's the  
prtconf
> -pv info:
>
>
>  Node 0x00001f
>    assigned-addresses:  >  
81020010.00000000.0000fc00.00000000.00000100.83020014.00000000.
> df2ec000.00000000.00004000.8302001c.
> 00000000.df2f0000.00000000.00010000
>    reg:  >  
00020000.00000000.00000000.00000000.00000000.01020010.00000000.00000000.00000000.00000100.03020014.00000000.00000000.00000000.00004000.0302001c.
> 00000000.00000000.00000000.00010000
>    compatible: 'pciex1000,58.1028.1f10.8' +  
'pciex1000,58.1028.1f10' > + 'pciex1000,58.8' + 'pciex1000,58' +  
'pciexclass,010000' + > 'pciexclass,0100' +  
'pci1000,58.1028.1f10.8' + > 'pci1000,58.1028.1f10' +  
'pci1028,1f10' + 'pci1000,58.8' + > 'pci1000,58' + 'pciclass, 
010000' + 'pciclass,0100'
>    model:  'SCSI bus controller'
>    power-consumption:  00000001.00000001
>    devsel-speed:  00000000
>    interrupts:  00000001
>    subsystem-vendor-id:  00001028
>    subsystem-id:  00001f10
>    unit-address:  '0'
>    class-code:  00010000
>    revision-id:  00000008
>    vendor-id:  00001000
>    device-id:  00000058
>    pcie-capid-pointer:  00000068
>    pcie-capid-reg:  00000001
>    name:  'pci1028,1f10'
>
>
> --eric
>
>
> --
> Eric D. Mudama
> edmud...@mail.bounceswoosh.org
>
> _______________________________________________
> zfs-discuss mailing list
> zfs-discuss@opensolaris.org
> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss



_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss

--
Med venlig hilsen / Best Regards

Henrik Johansen
hen...@scannet.dk
Tlf. 75 53 35 00

ScanNet Group
A/S ScanNet
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss