logic28
03-16-2006, 05:26 PM
Hi guys, I have a question.
I am building a workstation with a combination of: PATA drives, SATA II drives, and SCSI Ultra-320.
Now, when I tested the Read / Write speed I obtained the following results in MB/sec:
PATA (IDE).................48.........43..........OK
SATA.........................62.........54........ ..OK
SCSI..........................28.........23....... ...VERY POOR
I thought there was something wrong with my onboard SCSI controller but when I tested the SCSI drives through an old 2940 Adaptec card (that provides at least 40 MB/s) I got exactly the same:
................................28.........23..... ...It must be the drives, I thought.
But even though they are not the latest, I never thought there was ever a SCSI so slow!
Or was there? :rolleyes:
Well, that is my question. I have never had reason to test drive speeds before so I am totally unaware of the performance of these drives nor I can find them on the net. I don’t want to blame the mobo yet, so I would appreciate any suggestions. ;)
SCSI DRIVES:
Seagate Cheetah....ST19101WC.............9 GB....Hot-swap
Compaq................BD018122C9...........18.2 GB....Hot-swap
Quantum............Atlas 10K 3.5 series...9.1 GB
Also, the two hot-swap drives don’t work at all unless an old 50-pin CD cutter is added at the end of the array.
I guessed that may be due to the 80 to 68-pin adapter possibly being too old and thus incompatible with U320. Possible?
And if so, why would they work in conjunction with the 50-pin SCSI device and not alone? :rolleyes:
I always added a terminator in all my tests.
I thank you all for your time.
Maz
I am building a workstation with a combination of: PATA drives, SATA II drives, and SCSI Ultra-320.
Now, when I tested the Read / Write speed I obtained the following results in MB/sec:
PATA (IDE).................48.........43..........OK
SATA.........................62.........54........ ..OK
SCSI..........................28.........23....... ...VERY POOR
I thought there was something wrong with my onboard SCSI controller but when I tested the SCSI drives through an old 2940 Adaptec card (that provides at least 40 MB/s) I got exactly the same:
................................28.........23..... ...It must be the drives, I thought.
But even though they are not the latest, I never thought there was ever a SCSI so slow!
Or was there? :rolleyes:
Well, that is my question. I have never had reason to test drive speeds before so I am totally unaware of the performance of these drives nor I can find them on the net. I don’t want to blame the mobo yet, so I would appreciate any suggestions. ;)
SCSI DRIVES:
Seagate Cheetah....ST19101WC.............9 GB....Hot-swap
Compaq................BD018122C9...........18.2 GB....Hot-swap
Quantum............Atlas 10K 3.5 series...9.1 GB
Also, the two hot-swap drives don’t work at all unless an old 50-pin CD cutter is added at the end of the array.
I guessed that may be due to the 80 to 68-pin adapter possibly being too old and thus incompatible with U320. Possible?
And if so, why would they work in conjunction with the 50-pin SCSI device and not alone? :rolleyes:
I always added a terminator in all my tests.
I thank you all for your time.
Maz