SATA: RAID 5 controller recommendations

[Petri Helenius]

Mike Tancsa wrote:

> At 09:15 PM 02/11/2005, Michael VInce wrote:
>
>> I have seen some network based SMP related performance problems 
>> vanish in 6.0 tests, admittedly I haven't done hard drive based tests 
>> but I wouldn't surprise me of performance drops on HDs in SMP on 6.0 
>> are gone as well.
>
>
> Yes, I noticed that well.  Unfortunately I seem to have a bad drive as 
> well so I will have to try swapping it tomorrow.  Although it might 
> just be a cable / connector issue as smartmontools doesnt see anything 
> on the drive.
>
Has the 3ware patchset for smartmontools been integrated into the port?

Pete

> da0: <AMCC 9550SX-4LP DISK 3.01> Fixed Direct Access SCSI-3 device
> da0: 100.000MB/s transfers
> da0: 343290MB (703057920 512 byte sectors: 255H 63S/T 43763C)
> twa0: ERROR: (0x04: 0x0009): Drive timeout detected: port=0
> twa0: ERROR: (0x04: 0x0009): Drive timeout detected: port=0
> twa0: ERROR: (0x04: 0x0009): Drive timeout detected: port=0
> twa0: ERROR: (0x04: 0x0009): Drive timeout detected: port=0
> twa0: ERROR: (0x04: 0x0009): Drive timeout detected: port=0
> twa0: ERROR: (0x04: 0x0009): Drive timeout detected: port=0
> twa0: ERROR: (0x04: 0x0009): Drive timeout detected: port=0
> twa0: ERROR: (0x04: 0x0009): Drive timeout detected: port=0
> twa0: ERROR: (0x04: 0x0009): Drive timeout detected: port=0
> twa0: ERROR: (0x04: 0x0009): Drive timeout detected: port=0
> twa0: ERROR: (0x04: 0x0009): Drive timeout detected: port=0
> twa0: ERROR: (0x04: 0x0009): Drive timeout detected: port=0
> twa0: ERROR: (0x04: 0x0009): Drive timeout detected: port=0
> twa0: ERROR: (0x04: 0x0009): Drive timeout detected: port=0
> twa0: ERROR: (0x04: 0x0009): Drive timeout detected: port=0
> twa0: ERROR: (0x04: 0x0002): Degraded unit: unit=0, port=0
>
>
>> Mike
>>
>>
>> Markus Kovero wrote:
>>
>>> Dell's CERC sata raid thingy works fast for me but when I turn SMP 
>>> on read  performance drops 50%+ (raid1,raid5,raid10 and single 
>>> volumes).
>>> I don't know if its aac problem or what.
>>> In leenox it works very well though.
>>>
>>> Yours
>>> Markus Kovero
>>>
>>> ray at redshift.com wrote:
>>>
>>>> At 09:17 PM 11/2/2005 +1100, Michael VInce wrote:
>>>> | For SATA I have always been getting the Dell 750s (now 850s) 
>>>> which use | the 'aac'
>>>> | Adaptec AdvancedRAID Controller driver, do 'man aac' for more 
>>>> details.
>>>> | Dell supply them with a 64meg cache and are hardware raid, I have 
>>>> always | just installed FreeBSD on them and only 1 hard drive comes 
>>>> up as RAID | should be.
>>>> | | I have only been ordering the machines in dual drive mirror 1 
>>>> Raid, but | you could get a PowerEdge Tower servers like the 830 
>>>> which do raid 5, I | never used one though.
>>>> | Alternatively all the Dell SCSI RAID systems have 256megs cache 
>>>> which | use the LSI Logic MegaRAID ( man amr )
>>>> | Stay away from the ultra low end SC1425 systems they have some 
>>>> kind of | software based raid.
>>>> | | The thing I have noticed is that if you compare other (often 
>>>> claiming to | be much cheaper) servers from other companies they 
>>>> often really skimp on | their hard drive subsystems with software 
>>>> based stuff claiming its RAID.
>>>> | | I used to be anti Dell and build my own U1 servers from case 
>>>> and up and | had a keen interest in cheap RAID technologies but I 
>>>> gave up a little | while ago.
>>>> | I believe Dell are great value when you consider their RAID | 
>>>> implementations and as long as you are happy with Intel chips.
>>>> | | Mike
>>>> | | Steven Hartland wrote:
>>>> | | > Anyone got any SATA RAID 5 controllers they can recommend
>>>> | > 64Bit PCIX.
>>>> | >
>>>> | >    Steve
>>>>
>>>> Steve - 3ware is very good.
>>>>
>>>> Mike - I have some benchmarks from a guy using a Dell with a raid 
>>>> and was
>>>> surprised to see how slow they were compared to our other hardware.
>>>> I didn't
>>>> run them myself, but the guy is on the list here some place.  I can 
>>>> send you a
>>>> copy of the spreadsheet if you want to look it over.
>>>>
>>>> Ray
>>>>
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>
>
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