Date: Wed, 02 Nov 2005 22:33:24 -0500 From: Mike Tancsa <mike@sentex.net> To: Michael VInce <mv@roq.com> Cc: freebsd-performance@freebsd.org Subject: Re: SATA: RAID 5 controller recommendations Message-ID: <6.2.3.4.0.20051102222452.0564eda0@64.7.153.2> In-Reply-To: <436972DE.8070002@roq.com> References: <000801c5d434$579de280$b3db87d4@multiplay.co.uk> <000801c5d434$579de280$b3db87d4@multiplay.co.uk> <3.0.1.32.20051102022618.00a73dc0@pop.redshift.com> <436896BD.6090405@multiwise.fi> <436972DE.8070002@roq.com>
next in thread | previous in thread | raw e-mail | index | archive | help
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. 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@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 >>> >>>_______________________________________________ >>>freebsd-performance@freebsd.org mailing list >>>http://lists.freebsd.org/mailman/listinfo/freebsd-performance >>>To unsubscribe, send any mail to >>>"freebsd-performance-unsubscribe@freebsd.org" >>> >_______________________________________________ >freebsd-performance@freebsd.org mailing list >http://lists.freebsd.org/mailman/listinfo/freebsd-performance >To unsubscribe, send any mail to "freebsd-performance-unsubscribe@freebsd.org"
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?6.2.3.4.0.20051102222452.0564eda0>