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HDD 'died' cyclic redundancy error

Discussion in 'Electronic Repair' started by Eeyore, Jul 19, 2007.

  1. Franc Zabkar

    Franc Zabkar Guest

    All the references I can find say that one should use cmd.exe wherever
    possible and that command.com should be used only for DOS apps that
    have trouble running under XP. One major difference appears to be that
    the latter doesn't support long file names. Another is that XP batch
    language is much more powerful than that afforded by command.com. In
    any case, cmd.exe is XP's native CLI, and command.com is for Win9x and
    DOS.

    - Franc Zabkar
     


  2. I assumed that command.com was included for legacy support as you have
    confirmed.
     
  3. feebo

    feebo Guest


    go to grc.com and buy SpinRite - well worth the money ($19 ish???). It
    has various different recover methods and will sample damaged sectors
    hundreds of times (if necessary) and use statistical analysis to
    rebuild damaged blocks. It can take days on a deep dive, but if the
    data is that valuable...

    You should still replace the drive once it is recovered so clone the
    disk onto a new one but this has saved my arse and that of lots of my
    customers many times. People know they should backup stuff but most
    don't. Spinrite has only been <100% effective on two occasions but
    that was down to drives with cascading failures - prolly cause the
    flying height of the head was compromised - dust or sunnik got loose I
    reckon. It can handle your CRC error by sampling the sector many times
    and rebuilding the checksum. Might take a day or more so be prepared.
    It did with a 120G IBM deskstar that I recovered a while back.

    Take the drive out of the current machine and put it in a known good
    machine - just in case hardware faults associated with the motherboard
    in the original machine are ensuring data is written badly - I have a
    micro ITX board that does this - I keep it for what I don't know -
    maybe I'll put a SATA card in the single PCI slot :eek:)

    Spinrite comes as an ISO image that you burn to a cd and then boot. As
    it is looking at the structure of the data as written to the disk, it
    doesn't care what format it's in (on the deepest dive that it).

    HTH

    F
     
  4. feebo

    feebo Guest

    hmmm... not convinced on the maxtor side of things... I have read
    loads but I use lots of maxtor kit and have only had a single drive
    fail (80G) years back.

    Most of the systems that I use/put together use RAID5, 10 or at the
    very least 1. So a single failure isn't an issue so long as you deal
    with it quick enough and not just sit on it like one customer. "Oh
    that red light has been on for months but it all seemed OK" Struth!

    Maxtor comes with 3 year warranty so any that fail in a RAID setup
    would be replaced no probs and if they fail after the 3 years, who
    cares? prolly long overdue for bigger, better, faster drives anyway.

    F
     
  5. bz

    bz Guest

    I use r-studio to recover data.
    Left one drive running last night. Lots of bad sectors 'unable to read
    after 10 retries'.

    The computer seems to freeze when it is accessing such a drive.
    It may take several days to finish making an image of this 76 GB drive.

    Then r-studio can scan the image and recover files [except for the data
    lost on the bad sectors, of course.

    I usually make an image first, for several reasons:
    1) it preserves the hard drive for further tries
    2) it is faster to recover from the image when there are lots of hardware
    failures.
    3) you can try different sectoring schemes to recover data when the
    directory has been trashed.

    As for fixing the drive, a low level format might 'fix' the drive by
    teaching it to ignore the bad sectors, but if it has been losing sectors
    due to mechanical damage to the disk surface, the problem will continue to
    get worse. The drive is unreliable.

    Check the mfg web site, the drive may be in warranty!
    You may get a free replacement drive.

    If the data on the drive is very valuable, there are companies that will
    recover data, even from damaged drives. It isn't cheap.

    I remember a company in canada that would return the drive repaired with
    data recovered for a flat fee of less than 1000 dollars [no charge if they
    couldn't recover your drive].




    --
    bz 73 de N5BZ k

    please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
    infinite set.

    remove ch100-5 to avoid spam trap
     
  6. PhattyMo

    PhattyMo Guest

    You mean an IBM Deathstar? They're notorious for dying.
    Just tossed a couple dead 60G's...
     
  7. Eeyore

    Eeyore Guest

    What's this then ?

    Type of file: MS-DOS Application
    Description: command
    Location: C:\WINDOWS\system32
    Size: 49.4 KB (50,620 bytes)


    Graham
     
  8. Eeyore

    Eeyore Guest

    In the case of Seagate, a case I well remember, both the original SCSI Barracuda
    drive I'd bought *and* its replacement died with a month of installation. I
    certainly call that premature.

    Graham
     
  9. Eeyore

    Eeyore Guest

    Ah yes. I've seen that at grc.com.

    I didn't know it did stuff like that. Thanks.

    Graham
     
  10. Eeyore

    Eeyore Guest

    Maybe so but I've always used command.com and it works just fine.

    Graham
     
  11. Good to see you behaving yourself.
    Keep it up!
     

  12. Uh... command.com is the old DOS command interpreter.

    cmd.exe is the NT "DOS Virtual Machine" shell.

    Different command interpreters can be invoked from within this shell,
    including command.com
     

  13. While I have had loads of Maxtor failures, and would never buy another.
    Yet Seagate just bought them.

    Just proves his stats are bull. ALL drive makers have drive failures.
    Including his precious make.
     
  14. Did Seagate promptly replace them for you?
     
  15. Eeyore

    Eeyore Guest

    I should damn well think so. They had 3 year warranties.

    Graham
     
  16. Meat Plow

    Meat Plow Guest

    I run Kubuntu Edgy on an AMD Athalon 64 desktop and an Asus widescreen
    laptop (Intel Centrino). Edgy installed with no intervention on my part
    on the laptop. I had to manually switch the X window source on the AMD box
    to support the embedded NVidia graphics hardware's acceleration. Funny
    thing is that I had all kinds of trouble reinstalling XP on this AMD 64
    because it's an E Machines made by Gateway and the proper chipset drivers
    were buried deep on the web site of the motherboard manufacturer (MSI).
     
  17. Meat Plow

    Meat Plow Guest

    Quantum was a good drive until Maxtor took the over I have a couple 4.7
    gig Fireballs that are used in my Fostex D90 8 track digital audio
    recorder.. I don't rely on hard drive quality, I rely on redundancy. I
    have cloned drives sitting on the shelf for this desktop and my laptop. My
    data is stored on a network storage server with two drives, one hidden.
    The active drive backs up to the hidden every morning at 3 am.
     
  18. Meat Plow

    Meat Plow Guest

    Fujitsu was another deathstar. I've ordered Dell Poweredge servers with
    hot swap RAID 5 in the past that were delivered with brand new bad Fujitsu
    drives. I finally had to insist another brand when specking out new
    servers.
     
  19. There's a commands.exe (in c:\HP\BIN) on this Vista <spit> machine
    that seems to be similar similar (if not identical) to cmd.exe.

    Note that cmd.exe (and my commands.exe) allow you to use the up-arrow
    key (or F3) to copy the previous command (as well as other things) so
    it's a lot more pleasant to use than the stripped command.com.

    Best regards,
    Spehro Pefhany
     

  20. Like other brands, they made some good drives, and some bad ones. If
    they were all bad, they would have been out of the business in a hurry.
    You can't name a HD brand that someone won't complain that they are all
    crap. When i was building custom PCs I let people pick out whatever
    they wanted. The price of each item covered the wholesale cost, labor to
    install it, and profit. Amazingly, 99% of the time they would chose
    whatever brand was the cheapest in the storage range they wanted.

    I've never had a Fujitsu hard drive fail on me, and I've only seen a
    few bad ones. I still have several good Fujitsu drives from computers I
    retired, after years of nearly 4/7 operation.

    Of course Fujitsu wasn't as widely used as some other brands.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
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