lphillips@lpami.wimsey.bc.ca (Larry Phillips) (06/04/90)
In <56897@bbn.BBN.COM>, cosell@bbn.com (Bernie Cosell) writes: >I've managed to mess up my hard disk a little bit. Disksalv is all >well and good, but far as I can tell [and I'd _love_ to be proven >wrong!!] it is pretty useless for your biggest device, since there is >nothing big enough to disksalv the device _to_. fsck on Unix has the >nice property of doing much of what disksalve does... but it manages to >do it *in*place*. Is there an equivalent trustworthy utility for Amy? 'A little bit'? Is that like 'a little bit pregnant'? ;-) Disksalv will salvage to multiple floppies, though it will be a pain, as multiple floppy operations always are, but it is do-able. You can also salvage to another HD partition, and stop Disksalv as the other partition gets close to being filled, copying some files off to floppy, or perhaps Zooing or ARCing them to make room. Any way you look at it, it's a bother, but if your most recent backup is not good enough to restore from, there really isn't much choice. Diskdoctor is a pretty iffy proposition. While it sometimes will do an admirable job, it will sometimes cause more grief than you eanted to hear about. Diskdoctor's major fault is that is does things 'in-place', and may not always do the right thing, or at least it may sometimes do the only thing, but not what you would have wanted. Bottom line on Diskdoctor is that even assuming it did the best job for you, you will still have to copy all the files off and restore. I figure it's better to either do it manually or Disksalv, then attempt a manual recovery. -larry -- The raytracer of justice recurses slowly, but it renders exceedingly fine. +-----------------------------------------------------------------------+ | // Larry Phillips | | \X/ lphillips@lpami.wimsey.bc.ca -or- uunet!van-bc!lpami!lphillips | | COMPUSERVE: 76703,4322 -or- 76703.4322@compuserve.com | +-----------------------------------------------------------------------+
cosell@bbn.com (Bernie Cosell) (06/04/90)
I've managed to mess up my hard disk a little bit. Disksalv is all well and good, but far as I can tell [and I'd _love_ to be proven wrong!!] it is pretty useless for your biggest device, since there is nothing big enough to disksalv the device _to_. fsck on Unix has the nice property of doing much of what disksalve does... but it manages to do it *in*place*. Is there an equivalent trustworthy utility for Amy? Thanks.. /Bernie\
dales@teksce.SCE.TEK.COM (Dale Snell) (06/05/90)
[woof!] In article <56897@bbn.BBN.COM> cosell@BBN.COM (Bernie Cosell) writes: |I've managed to mess up my hard disk a little bit. Disksalv is all |well and good, but far as I can tell [and I'd _love_ to be proven |wrong!!] it is pretty useless for your biggest device, since there is |nothing big enough to disksalv the device _to_. Sure there is! Get yourself a *big* stack of formatted floppy disks and settle down for a nice long session of disk swapping. (Well, they don't have to be preformatted, but it goes faster.) Then type "Disksalv from DH1: to DF1:" (or whatever drives you're using). DiskSalv will happily salvage the hard drive partition to your stack of floppies. It works just fine, trust me -- I've done it. | fsck on Unix has the |nice property of doing much of what disksalve does... but it manages to |do it *in*place*. Is there an equivalent trustworthy utility for Amy? That would certainly be a nice utility to have. Certainly the disk validator doesn't cut it, and as for DiskDoctor, the less said, the better. |Thanks.. | /Bernie\ You're welcome. "Glad to be of service." --dds Dale D. Snell dales@teksce.SCE.TEK.COM 74756.666@compuserve.COM "Nice house. Good tea."
lphillips@lpami.wimsey.bc.ca (Larry Phillips) (06/06/90)
In <1990Jun6.042910.297@foetus.syd.sgi.oz.au>, peterk@foetus.syd.sgi.oz.au (Peter Kerney.Silicon Graphics.Australia) writes: >From article <3396@teksce.SCE.TEK.COM>, by dales@teksce.SCE.TEK.COM (Dale Snell): >> That would certainly be a nice utility to have. Certainly the disk >> validator doesn't cut it, and as for DiskDoctor, the less said, the >> better. > >Diskdoctor sux! > >One thing I have noticed on my A590. If you visit the GURU while doing I/O, >when you reboot, the hard disk goes beserk. It seems to be doing 800 time the >amount of work when going through s:startup-sequence et. al. > >I dont know whether this is doing some type of fsck or what, but I haven't >had any corruptions yet (quick, where is a piece of wood, touch). It's being validated. The validator ( L:Disk-Validator ), checks the root block and sector zero, and if it finds anything amiss, does further checks. When you stop a write in progress through a GURU, power hit, and so on, it can leave the bitmap in a 'funny' state, and the 'bitmap valid' flag will be turned off. When the validator finds this, it will scan through the entire directory structure, rebuilding an image of the bitmap. When it's done, it will wrote the bitmap out and set the bitmap valid flag on again. The validator will not attempt to repair any file system inconsistencies it finds. >A590's have ffs on them. Anyone throw any further light on this. Yup, they do at that. What further light are you in need of? -larry -- The raytracer of justice recurses slowly, but it renders exceedingly fine. +-----------------------------------------------------------------------+ | // Larry Phillips | | \X/ lphillips@lpami.wimsey.bc.ca -or- uunet!van-bc!lpami!lphillips | | COMPUSERVE: 76703,4322 -or- 76703.4322@compuserve.com | +-----------------------------------------------------------------------+
peterk@foetus.syd.sgi.oz.au (Peter Kerney.Silicon Graphics.Australia) (06/06/90)
From article <3396@teksce.SCE.TEK.COM>, by dales@teksce.SCE.TEK.COM (Dale Snell): > That would certainly be a nice utility to have. Certainly the disk > validator doesn't cut it, and as for DiskDoctor, the less said, the > better. Diskdoctor sux! One thing I have noticed on my A590. If you visit the GURU while doing I/O, when you reboot, the hard disk goes beserk. It seems to be doing 800 time the amount of work when going through s:startup-sequence et. al. I dont know whether this is doing some type of fsck or what, but I haven't had any corruptions yet (quick, where is a piece of wood, touch). A590's have ffs on them. Anyone throw any further light on this.
new@udel.EDU (Darren New) (06/06/90)
In article <1990Jun6.042910.297@foetus.syd.sgi.oz.au> peterk@foetus.syd.sgi.oz.au (Peter Kerney.Silicon Graphics.Australia) writes: >One thing I have noticed on my A590. If you visit the GURU while doing I/O, >when you reboot, the hard disk goes beserk. It seems to be doing 800 time the >amount of work when going through s:startup-sequence et. al. This is the "disk validator." It is started whenever you mount a volume whose bitmap has not necessarily been flushed. The validator runs through the directory structure checking that there are no inconsistancies. My recent posting (validate) will force this without you having to do a reboot. Not that the validator is NOT like fsck. fsck will repair a file system in place. The validator will only tell you there is a problem without fixing it. -- Darren
bscott@nyx.UUCP (Ben Scott) (06/07/90)
In article <1990Jun6.042910.297@foetus.syd.sgi.oz.au> peterk@foetus.syd.sgi.oz.au (Peter Kerney.Silicon Graphics.Australia) writes: >One thing I have noticed on my A590. If you visit the GURU while doing I/O, >when you reboot, the hard disk goes beserk. It seems to be doing 800 time the >amount of work when going through s:startup-sequence et. al. > [...] >A590's have ffs on them. Anyone throw any further light on this. (presuming someone else will answer in detail about the disk validator) Be glad the A590 has FFS on it! I am told that if it were OFS the validation process would take much, much longer. Basically your disk is being validated in parallel with your startup thanks to Multitasking (all praise be to it) and you are hearing disk gronking at HD warp speeds. Mine usually finishes shortly after my startup, and it's no problem. It scares me every time this happens... if the validator cannot finish, my HD is history... at best I will have to back up and restore. At BEST. So far, so good... . <<<<Infinite K>>>> -- |Ben Scott, professional goof-off and consultant at The Raster Image, Denver| |Internet bscott@nyx.cs.du.edu, FIDO 1:104/421.2 or Arvada 68K (303)424-9831| |"My brothers and sisters all hated me,'cause I was an only child!"-Weird Al| |"Do I detect the smell of burning martyr?" - Basil Fawlty | *AMIGA POWER* |