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#11
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..::SuperBLUE::. wrote:
39320 is not a RAID controller... http://www.geizhals.at/eu/?cat=sccraid&sort=p Depends on your definition. It appears to be host-based, in other words it's software RAID only with BIOS support for boot. -- --John to email, dial "usenet" and validate (was jclarke at eye bee em dot net) |
#12
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"Peter" wrote in message
Hello, I am looking for fastest raid 0 storage solution for a workstation. Is Adaptec 39320 controler + 6 Fujitsu mas 36gb 15000 rpm drives u 320 the fastest i could get or is there something else, faster? Thanks Fast is a generic term. Be more specific. Fast RAID for a database, web server or a streaming application requires a different selection criteria. Oh? How so? |
#13
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..::SuperBLUE::. wrote:
This workstation is used for various 35mm film and hdtv video production effects. So you need fast reads and writes on large files, but not extremely fast access. For this application, the high (15k) rpm drives you mentioned won't provide much additional benefit to offset their high cost. |
#14
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Maxim S. Shatskih wrote:
You could possibly use software RAID0 solution, That is what all RAID is, software. The only difference is where this software runs on/runs in, whether that's a dedicated processor, bios+driver or driver only. Software RAIDs are often more reliable and better coded then hardware ones. The Linux community or Veritas Corp (MS licensed the lite version of Veritas's VxVM to Windows as "Dynamic Disk") can produce better code then the small company with small development bugdets and heavy time-to-market requirements. The only drawbacks of the software RAID are a) hardships in some OSes like Windows in booting from it - Windows can boot from mirror only, not from stripe or span set or RAID5 b) RAID5 checksum calculation is done by the host CPU, which is slow. If one does not use RAID5, but uses mirror - then I see no advantages in hardware RAID. Unless your main process is CPU-bound. -- --John to email, dial "usenet" and validate (was jclarke at eye bee em dot net) |
#15
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You could possibly use software RAID0 solution,
That is what all RAID is, software. The only difference is where this software runs on/runs in, whether that's a dedicated processor, bios+driver or driver only. Software RAIDs are often more reliable and better coded then hardware ones. The Linux community or Veritas Corp (MS licensed the lite version of Veritas's VxVM to Windows as "Dynamic Disk") can produce better code then the small company with small development bugdets and heavy time-to-market requirements. The only drawbacks of the software RAID are a) hardships in some OSes like Windows in booting from it - Windows can boot from mirror only, not from stripe or span set or RAID5 b) RAID5 checksum calculation is done by the host CPU, which is slow. If one does not use RAID5, but uses mirror - then I see no advantages in hardware RAID. -- Maxim Shatskih, Windows DDK MVP StorageCraft Corporation http://www.storagecraft.com |
#16
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My experiments with Win2003 server backed by EMC CX-700 (2Gbit
fibre-channel) show that best throughput was achieved with hardware RAID-10 sets striped in software so that multiple LUNs were visible to the OS. With a 2Tb drive created from five 400Gb RAID-10 sets each consisting of six 133Gb drives, throughput was several hundred percent better than with the RAID-10 all done in hardware and only presenting a single LUN to the OS. OTOH, with Win2000 as the OS the software striping gave no appreciable advantage over the hardware striping. My testing was done with the MS Loadsim 2003 stress test tool for simulating a production Exchange environment. Nick |
#17
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"Folkert Rienstra" wrote in message
eenews.net... "Eric Gisin" wrote in message Don't be stupid. Hardware RAID is of no benefit on the desktop, especially from Adaptec. If you do not have PCI-X, the fastest (STR) available is RAID 0 on Intel's i9XX and nForce4 SATA2. If you want a fast workstation, get a 15K SCSI OS drive, and IDE for data. And you said "Don't be stupid"? This is an A/V workstation. 7200 IDE has taken over 10K SCSI in this application, because of price and drive capacity. 4 IDE drives will do 300MB/s today, an Ultra320 channel is less. Tell us Folknuts, what would you recommend? Or are you just going to troll? |
#18
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Maxim S. Shatskih wrote:
.... If one does not use RAID5, but uses mirror - then I see no advantages in hardware RAID. Well, if your controller has even a very small amount of NVRAM in which to record current write operations, the hardware approach can avoid the need to perform a complete mirror resynch after something as common as a power failure (even when such software resynchs are done in the background, they consume disk performance resources). And if your controller has somewhat more (preferably mirrored) NVRAM, it can perform some significant write-back optimizations on the write stream (while significantly improving perceived write latency in the process). Other than that, and avoiding the additional processor interrupts and bus and memory activity which software mirroring requires, I agree. - bill |
#19
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U comp.periphs.scsi Eric Gisin prica:
4 IDE drives will do 300MB/s today, an Ultra320 channel is less. Well, to tell you the truth... RAID0 over 12 Hitachi 160GB/8MB 7K250 drives (SATA), on 3Ware 9500S-12 SATA RAID controller, and I could get 350MB/s read and 210MB/s write speed... How the heck could you get 300MB/s on 4 ATA drives?!!!!! 3Ware 9500S-12, 128MB cache, PCI-X 66MHz 12x Hitachi 7K250, 160GB/8MB, 64kb stripe size The machine was a video-capture workstation... Tested with BlackMagic Design software for video-capture speed testing... Capture card was BlackMagic Design DectLink Extreme IIRC... -- Opekaa gura u kantini ekonomije divovski dorucaku ugnjetavu danima. By runf Damir Lukic, a member of hr.comp.hardver FAQ-team |
#20
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U comp.periphs.scsi Folkert Rienstra prica:
39320 is not a RAID controller... Yes, it is. Just not an all purpose one. ? Hmmm? 39320 is, accoring to Adaptec's support page plain SCSI HBA... RAID? Sorry, I couldn't find any RAID funcion in it... Any links? You could possibly use software RAID0 solution, That is what all RAID is, software. The only difference is where this software runs on/runs in, whether that's a dedicated processor, bios+driver or driver only. OK, I get your point... but I don't recommend it... Who cares what you recommend. Well, yes, who cares? Second... What kind of speed you need? Fast read, write, seek? Do you always have to ask questions that the post already answers? I intend to get as much info as possible... -- "Izbacens li beogradjaninu vjesu ?" upita eurokremo tuce pajseru ubiju. "Nisam ja nikog bombardiro !" rece kondoma pozdravlja "Ja samo rukometasu guru blesavm !" By runf Damir Lukic, a member of hr.comp.hardver FAQ-team |
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