Mixing SAS and SATA drives

[Radim Hejc]

I was trying today to mix two 76GB SAS 15krpm Fujitsu drives and two 
750GB Seagate SATA drives together
(2x RAID1 both Dell Originals) on PE 2950, but after server reboot i'm 
still getting messages about Foreign configuration
from PERC/6i controller, then one of SATA drives is always degraded. 
When i removed SAS everything seems to work fine

strange thing, i will research more

Radim Hejc(
IT infrastructure
U-TURN, a.s.
Argentinská 38/286
17000 Praha 7, Czech rep.

Tel.: +420.777190160
ICQ: 11064792




Tony Molloy napsal(a):
> On Tuesday 04 March 2008 11:11:56 Mark Watts wrote:
>   
>> On Tuesday 04 March 2008 10:51:12 Tony Molloy wrote:
>>     
>>> On Tuesday 04 March 2008 09:49:37 Hostmaster wrote:
>>>       
>>>>>>> Can't mix SATA and SAS disks. So we can't supply 2X73GB, SAS,
>>>>>>> 3.5-inch, 15.000 rpm Hard Drive 4X750GB, SATA, 3.5-inch, 7200 rpm
>>>>>>> Hard Drive. Instead I've configured 2X73GB, SAS, 3.5-inch, 15.000
>>>>>>> rpm Hard Drive 4X400GB, SAS, 3.5-inch, 10,000 rpm Hard Drive.
>>>>>>>               
>>>>> Can I do this and if I can how do I get Dell to supply me with that
>>>>> configuration.
>>>>>           
>>>> AFAIK its *technically* possible to mix them, however it isn't a Dell
>>>> supported configuration, therefore they won't sell them that way.
>>>> Several of the guys from Enterprise Storage frequent these lists, so
>>>> they will be able to give you the final word, but it might just be
>>>> easier to buy the server with the supported config (ie just the two SAS
>>>> drives for the OS), and then put a separate order for the four SATA
>>>> drives, but check with someone who knows the PERC6/i better than me
>>>> before buying!
>>>>         
>> This question has been asked before.
>>     
>
> As I said in my mail I know it has been asked before but I'm just about to 
> spend 50,000+ euros on a rack so I wanted to be sure.
>
>   
>> You can mix SATA/SAS disks on the same backplane, but the cannot be in the
>> same logical volume.
>>
>>     
>
> That was my impression of the previous thread so my RAID1/RAID5 configuration 
> should work. The problem then is to get Dell to sell that configuration to 
> me.
>
> Thanks,
>
> Tony
>   
>> http://lists.us.dell.com/pipermail/linux-poweredge/2008-February/035159.htm
>> l
>>     
>
>
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