cathy@larry.sal.wisc.edu (Cathy Accettura) (06/17/89)
I am running Ultrix 3.0 on a Microvax II. We have just installed a SCSI Disk Controller from Dilog Model SQ706A and 2 Wren V SCSI disk drives model 94181 from CDC. I have run format and done unit mapping on the drives. I ran newfs on the a partion for each of the drives. I set up all the partions with a the chpt command the way I want them. I then ran newfs for b and h on each of the 2 drives. Finally I did a fsck on the a partion of the drives and this is O.K. I then run fsck on the b partion. I get the error CAN'T READ BLOCK NUMBER XXX. This block number changes each time I try the fsck. I also have the same problem when I try to fsck the h partion. I have tried it on both drives and it gives me the same error. When I was attempting to setup the drive on my system. I called CDC to find out how many sec/track, track/cyl and cyl they had. The told me the number of sec/track varied depending on which track you where on. They mentioned that they were using something called "zone bit" Can ultrix handle this? Does anyone have a sucessful setup that is anything like this? Help. cat Cathy Accettura University of Wisconsin Space Astronomy Lab cathy@larry.sal.wisc.edu
andrew@alice.UUCP (Andrew Hume) (06/19/89)
i have been having much trouble getting my Wren V's to work on my MIPS M120. CDC claimed they never heard of any problem. MIPS said it must be hardware. The new release of the OS (RISC o/s 4.0) seemed to alleviate but not eleminate the problem. according to the MIPS people at usenix, it is a firmware bug in the drive (fixed by sending it back) that buggers up on big transfers (such as fsck might do).
neese@adaptex.UUCP (06/20/89)
The thing that CDC is refering you to is what they call Zone Bit Recording,
or ZBR. This simply put means that there are zones on the drive that
have a different number of sectors per zone going from 54 sectors/track
to 32 sectors/track. The different number of sectors is hidden from the
SCSI interface as the interface represents logical block addresses only.
I have used the CDC Wren V drives for quite some time under SCO and
have had no problems with them.
Roy Neese
Adaptec Field Applications Engineer
UUCP @ {killer, texbell}!cpe!adaptex!neese
merch!adaptex!neese