Help for IBM Ultrastar 10k rpm scsci hd !!!!!!!!!

[zener]

I try to hookup an IBM Ultrastar DDYS-T18350 to the adaptec 2940 uw scsci with no success. Even if the scsci disk utilities of the adaptec can format the ibm drive, I cannot write or fdisk the drive at all either in win2k, win98 or dos(write error message). Currently the adaptec 2940 has on the a plextor 12/10/32 cdrwriter (id 4)and a plextor 20x cdrom (id 6 and terminated) on the 50 pin side. The 2 plextors work fine. I hook up the IBM on the 68 pin side (id 1), with autospin enable and with either term power enable or disable, I still have write error. Thanks for any advice. System : asus cusl2-c, p3 650 @933, 384 megcrucial cas2 mem, 20 gig quantum LM running win2k on master ide0, 30 gig IBM deskstar running win98 on master ide 1,
toshiba dvd 1401, plextor 12/20x and plexwriter 12/10/32 on adaptec 2940 uw.

 

[Big Lar]

It could be your cable, Is it self Terminating? Most LVD drives are terminated by cable, and if you are running a Standard 68 pin cable without Active Termination, that may very well be the Problem.

 

[resinboy]

yup, I was just gonna say, make sure you have an active terminator plugged in the end of the lvd cable- been there
Resinboy

 

[bacillus]

in addition to the above, if you're going to be booting from the scsi drive, it should have an ID of 0!

 

[Rellik]

About that boot id 0 stuff. Not true. Often misinterpreted.
SCSI ID´s are not te same as BOOT DRIVE. The HD 0 is the boot disk, then follow HD 1 etc.. This does not refer to the SCSI ID. YOU can specify which device is HD 0(bootdrive) via the SCSI bios of your controller. Example: SCSI ID 6 = HD 0 (Bootdrive)


About the inital problem. Recheck your ID´s IBM HD´s are shipped with SCSI ID set to 6 and finding the proper jumpers can be tricky. refer to the IBM storage website.

since you are running a 650 at 933, your pci bus is overclocked( a 700 at 933 is fine, since there are 1/4 devider) and SCSI drives are way more sensitive to overclocking. Try at clockspeed or at another speed that gives you a 33Mhz pci bus(such as 6.5 * 133 for 866 and a 1/4 devider for 33Mhz pci)

 

[bacillus]

<< YOU can specify which device is HD 0(bootdrive) via the SCSI bios of your controller. Example: SCSI ID 6 = HD 0 (Bootdrive) >>


agreed but why would anyone want the bootdrive on such a high priority as in your example?

 

[Hard_Boiled]

You mean priority as in ID 0 has higher priority than ID 6? I'm not certain but I think it 6 has the higher priority. Usually the controller is ID 7, then id 6 is next in priority, on down to 0. But, from what I can tell most controllers have ID 0 as the boot device as the default.

And I think he should try and get a terminator on the cable as well, don't try terminating the HD with a jumper on the drive.

 

[Big Lar]

As to the ID # of the drive, commonly either 0 or 1 is used, and yes, Priority goes from 7 down to 0, then back to 8 and on up, depending on the controller. A boot drive does not need a high priority tho, and The modern 160 and U2W drives do not have an external drive terminator. Sca drives however do.

 

[bacillus]

thanks Big Lar for you reply as it saves me some typing to clarify things!

 

[Big Lar]

.. It's always easier to have 2 people typing, more gets across in a shorter time

 

[borealiss]

if you have an ultra wide controller card, you should not need an active terminator since the drive should default to single-ended mode and cannot operate in lvd mode. i have an ibm ultrastar lvd drive, and if i just hook it up to an ultra wide interface, i have to set the scsi bios to automatic termination in order for it to work. if i don't, it will not work. but i don't need an active terminator on an uw interface.