>>Dell finally sells a controller with true JBOD mode?
YES ! and better, you can mix hardware raid and JBOD :)
(i'm talking about H330 , lsi 3008 chipset)
----- Mail original -----
De: "Jan Schermer" <j...@schermer.cz>
À: "Yann Dupont" <y...@objoo.org>
Cc: "ceph-users" <ceph-users@lists.ceph.com>
Envoyé: Mercredi 10 Février 2016 11:30:21
Objet: Re: [ceph-users] Dell Ceph Hardware recommendations
Dell finally sells a controller with true JBOD mode? The last I checked they
only had "JBOD-via-RAID0" as a recommended solution (doh, numerous problems)
and true JBOD was only offered for special use cases like hadoop storage.
One can obviously reflash the controller to another mode, but that's not really
"supported".
R730xd would make a nice converged box if only it wasn't so complicated in
every way (feature-wise, number of firmwares, OMSA to make it supportable...).
Less is more in this case. Good for VMware, though...
Jan
> On 10 Feb 2016, at 11:24, Yann Dupont <y...@objoo.org> wrote:
>
>
>
> Le 10/02/16 03:55, Matt Taylor a écrit :
>> We are using Dell R730XD's with 2 x Internal SAS in Raid 1 for OS. 24 x
>> 400GB SSD.
>>
>> PERC H730P Mini is being used with non-RAID passthrough for the SSD's.
>>
>> CPU and RAM specs aren't really needed to be known as you can do whatever
>> you want, however I would recommend minimum of 2 x quad's and at least 48GB
>> of RAM.
>>
>> NICS are 4 x 10G (2 x 10 bonded for cluster, 2 x bonded for public).
>> Naturally, you have the 4 x 1G on-board too.
>>
>> Performance is very good for us.
>
> Quite the same here too, with a mix of R730xd for capacity tier (Pure
> mechanical 8 Gb drives) and 2xR630 for SSD tier.
>
> 1 problem to be aware of :
>
> -> We have "write intensive" Dell-branded SanDisk OEM (LT0400MO), and there
> is a problem with stock firmware : When used with H730P in raid0 mode, it
> works like a charm. When put in HBA mode, as soon as you start to write data,
> you have almost immediately SCSI write errors with the disk marked faulty, an
> then it's a brick :/ . Firmware D413 fixed the problem ("faulty" disks were
> changed)
>
> So before doing extensive tests, if drives are of this model, make sure you
> have latest firmware :)
>
> Cheers,
> Yann
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