farhad@CS.Stanford.EDU (Farhad Shakeri) (04/27/91)
In article <1991Apr22.191208.796@roundup.crhc.uiuc.edu>, steven@pacific.csl.uiuc.edu (Steven Parkes) writes: |> We're in the market for a 1+GB SCSI disk and an Exabyte 8200. So far we have |> quotes on the Fujitsu M2266, the WREN VII, and an HP (I don't have the model |> number at hand.) Any notable observations on these or other drives would be |> appreciated -- things such as noise, reliability, and performance. |> |> We are also looking for sources that have good (university) pricing and have |> currently talked with NPI(IL), R^2(CO), and Datalink(IL). Well I was about to post a question and I saw this related article: (I hope it will help Steven too) I have a Fujitsu M2266s drive and I have a major problem if I was to use the entire disk as one partition (c=2107704 / 512 given by "chpt -q device-name " ). The problem is that, if I fill the disk %111 then I lose the entire filesystem. I get the error . or .. not found and fsck gives me the famous : BAD SUPER BLOCK: MAGIC NUMBER WRONG USE -b OPTION TO FSCK TO SPECIFY LOCATION OF AN ALTERNATE SUPER-BLOCK TO SUPPLY NEEDED INFORMATION; SEE fsck(8). I could not recover anything with any alternate super-block. I was told by another programmer that the problem is with the Ultrix 4.1 scsi driver that can not handle more that one GIG. (old ansi standard?). Well to fix this problem I decreased the size of c partition to (1705*15*82=2097150) this has fixed the problem with not much loss. ^ ^ ^ ^ c h s/t <------These numbers were given in R-Squered Manual Ok my question: Is there a fix for the scsi driver under 4.1A or is 4.2 going to have this fix? Has anyone seen this problem? I think Ultrix 4.1A scsi driver is still in group 0 of American National standard for scsi and what I need is a scsi driver in Group 1. for more info you can look at ANSI X3.131-1986 page 95 for group 0 Table 8-10 and page 116 for group 1 Table 8-26 . Oh the price we paid for M2266S-512 from R-Squered was below $3000. Noise level was high when I was doing heavy IO (5 dds of bs=100k). In normal performance in a quiet room + a DS3100, it sounds like a chicken once in a while. :-) but much better than rz55. I have not done a real performance test, maybe someone else can help you on that. Thanks in advance! -- +----------------------------------------------------+ / Farhad Shakeri E-Mail: / / Stanford University farhad@CS.Stanford.EDU / / Computer Science Department / +----------------------------------------------------+
sac@decuk.uvo.dec.com (Stephen A Carpenter) (04/27/91)
In article <1991Apr27.000052.23509@neon.Stanford.EDU>, farhad@CS.Stanford.EDU (Farhad Shakeri) writes: |>Ok my question: Is there a fix for the scsi driver under 4.1A or |>is 4.2 going to have this fix? Has anyone seen this problem? Ultrix V4.2 will have the 1+ Gb SCSI disk fix. -- Stephen Carpenter sac@decuk.uvo.dec.com UK Ultrix Support Digital Equipment Corporation
ef1c+@andrew.cmu.edu (Esther Filderman) (04/29/91)
Excerpts from netnews.comp.unix.ultrix: 27-Apr-91 Re: SCSI disk sources Stephen A Carpenter@decu (392) > In article <1991Apr27.000052.23509@neon.Stanford.EDU>, > farhad@CS.Stanford.EDU (Farhad Shakeri) writes: > |>Ok my question: Is there a fix for the scsi driver under 4.1A or > |>is 4.2 going to have this fix? Has anyone seen this problem? > Ultrix V4.2 will have the 1+ Gb SCSI disk fix. Great. Now, when are they going to fix the broken device driver for the RZ57? They are supposed to be 1 Gb disks, but you cannot get more than ~975 Meg from them (using the C partition). ================================= Esther C. Filderman ef1c+@andrew.cmu.edu System Manager Library Automation Mercury Project Carnegie Mellon University They are gardeners and carpenters. They are not tomato men.