bad performance on SCSI.

[superlooser]

Hey. I have recently bought an Adaptec 19160 and a Hitachi 15k. The cabel has only to ports, one in each end, it's a 68-pin.
I made a partition, a full format in NTFS, since the disk was new. Then I installed XP-pro, XP found the disk so I waited with driver-load til installation was done, so I loaded the driver through device manager after install of Intel chipset driver.

BUT.
I ran a test with HD-tach, the seek-time was 5.9 ms, but sequential read was bad, 22.1 MB, but it didn't drop throug-out larger read-chunks, just a plain line, but something must be wrong. The seektime seems OK, and PC seems very responding and fast. Maybe something is wrong with

Can someone help me here? I'm blank on SCSI, there are some jumper on the disk, and the cabel is point-to-point, a cheap one, I bougth the controller and a Seagate 142 GB 10k for 1200 $. A good buy I think, but until the PCI-bus is the limit (no the pci-bus is laughing)I'll wait with concluson.

Well, are there some nice ppl with SCSI-know-how who may help..

 

[Peter]

If you get a flatline throughput limit, then chances are your SCSI interface isn't running at its best mode. To get Ultra-160 speed, you need a twisted-pair cable (not a straight ribbon) with an "LVD" terminator on its far end.

Have a closer look at what the Adaptec card's BIOS has to say during POST, and reset its configuration menu to factory defaults.

The "normal" PCI bus (32-bit 33 MHz) will hit the ceiling at about 95 MB/s storage throughput.

 

[Steve]

Yep, get a new cable better suited for this.

Also, where are you located? That price seems a bit high.

Can you tell us what jumpers are set on the drive?

 

[Zepper]

Thirds on the get a proper cable suggestion. You will need at least a U-160 rated LVD cable. It should have one socket on one end for the adatpec card, at least one device socket for the drive and either another socket on the end into which you plug your active LVD terminator or have the terminator permanently attached. Here is a high-quality cable w/ terminator for a great price: U-320 LVD cable.

Or this one: LVD cable

Or if you'd rather buy a new one, here are some places where I get my SCSI stuff:

Here are some good SCSI vendors:

http://www.hypermicro.com (may offer free ground shipping if you mention www.storagereview.com - check the SR site for the latest offer)
http://www.centrix-intl.com
http://www.pc-pitstop.com (offers PayPal as a payment option)
http://www.scsi4me.com (ditto)
http://www.etech4sale.com
and I can usually find stuff (like drives, cables and adapters) for low bucks on eBay.

And you didn't mention the model of the Hitachi 15k drive. That's important info for troubleshooting speed issues, so we can look up the specs and jumper configs.

.bh.