andrew@megadata.mega.oz.au (Andrew McRae) (03/26/91)
I know this has been discussed previously, and perhaps someone has a summary that they can send me, but I am having continual problems with a Wren V on a Sparcstation 1+ (SunOS 4.1.1) that seem to relate back to a partitioning problem. The disc has been running for a long time previously on a Sun 3/60 running 4.0.3 with no problems. As most of us know, the Wren V (94181-702) has variable sectors/track, and so selecting the right format parameters is not obvious. I have used the parameters in the 4.1.1 standard format.dat for sectors/track, cylinders etc, but the partition data for the Wren seems entirely wrong (e.g. partition c = 0, 639450 - 320 Meg??), so I split the disc into three equal partitions as such: sd1: Emulex MD21 controller at addr f8800000, unit # 8 1543 cylinders 15 heads 48 sectors/track a: 367200 sectors (510 cyls) starting cylinder 0 b: 367200 sectors (510 cyls) starting cylinder 510 c: 1101600 sectors (1530 cyls) starting cylinder 0 d: 367200 sectors (510 cyls) starting cylinder 1020 Even though I should be able to access up to cylinder 1543, I get read errors beyond 1530, hence the reduced size. Two problems are bothering me. In the course of using the disc, and also doing surface analysis using format, the disc is de-selecting and timing out. More often a messages appears (approx): sd1: incomplete read- retrying No mention of this message in the sd man entry. BTW the disc is running synchronous (at 4.167 Mb/s). Performing a burn in using format and surface analysis seemed to reduce the errors (the incomplete read errors, that is) so I suspected that media errors were causing the message. The other (and more serious problem) is that once three file systems are built on the disc, strange file system problems occur which crash the system, such as `freeing free inode'. When this occurs the file system in question seems quite damaged in places, almost as if the other partitions are overlapping it. When I mount two of them read only, the problems seem to go away. Could this be caused by some partition problem? Does anybody have the complete low-down on Wren V's, SunOS 4.1.1 etc that they could tell me? I am attempting to get a Wren manual, but if there are jumpers to enable modes etc, it would be good to know. Thanks a lot (in advance). Andrew McRae inet: andrew@megadata.mega.oz.au Megadata Pty Ltd, uucp: ..!uunet!megadata.mega.oz.au!andrew North Ryde 2113 Phone: +61 2 805 0899 NSW AUSTRALIA Fax: +61 2 887 4847