Skate323k137
Well-known member
I recently decided to test out the v5 and v6 devices in comparison on my Power Macintosh 7500.
The machine has 256MB ram and a 500 mhz sonnet G3 card.
Using norton to benchmark the disks I tested the v5 and v6 scsi2sd each on the internal SCSI bus and then on an ATTO PCI SCSI card. The net benefit of the scsi card was about 15% sequential read speed on the SCSI2SD v6, or 5% increase in random read on the scsi2sd v5.
Not surprisingly the v6 outperformed the v5 to an impressive margin. I settled with V6 on PCI, as the sequential read improvements save about 5 seconds for reboots, and apps seem to launch nice and quickly.
The V6 is supposed to top out at 10MB read, as is the power mac's internal scsi bus. Apparently the internal scsi bus hits it's practical (not theoretical) limit before the scsi2sd, since the ATTO PCI card is able to manage a bit more speed out of the V6.
The machine has 256MB ram and a 500 mhz sonnet G3 card.
Using norton to benchmark the disks I tested the v5 and v6 scsi2sd each on the internal SCSI bus and then on an ATTO PCI SCSI card. The net benefit of the scsi card was about 15% sequential read speed on the SCSI2SD v6, or 5% increase in random read on the scsi2sd v5.
Not surprisingly the v6 outperformed the v5 to an impressive margin. I settled with V6 on PCI, as the sequential read improvements save about 5 seconds for reboots, and apps seem to launch nice and quickly.
Code:
V5 INTERNAL SCSI BUS | V5 ATTO PCI CARD | V6 INTERNAL BUS | V6 ATTO PCI CARD
Random Read : 520 K/s 544 K/s 1170 K/s 1153 K/s
256K Seq Read : 1253 K/s 1253 K/s 7843 K/s 9065 K/s
Random Write : 377 K/s 406 K/s 680 K/s 675 K/s
256K Seq Write: 1440 K/s 1440 K/s 3912 K/s 3920 K/s
The V6 is supposed to top out at 10MB read, as is the power mac's internal scsi bus. Apparently the internal scsi bus hits it's practical (not theoretical) limit before the scsi2sd, since the ATTO PCI card is able to manage a bit more speed out of the V6.
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