Why does dd take so long on my Ultra 60

From: Angelo Alvarez (angelo_at_hawaii.rr.com)
Date: 10/19/04

  • Next message: Scott Howard: "Re: Why does dd take so long on my Ultra 60" 
    Date: 19 Oct 2004 03:36:39 -0700

    I am trying to clone a 36GB Seagate ST336704LC using dd. The disk is
    starting to fail, so I want to replace it as soon as possible. At
    first I tried this:
    dd if=/dev/rdsk/c0t1d0s2 of=/dev/rdsk/c0t0d0s2 bs=256k.
    After about 4 hours, I got tired of waiting and killed the process
    (output showed 97740+0 records in and 97740+0 records out. So after
    reading several posts regarding block size, I used a bs=8192k. Well,
    here I am about 3.5 hours later and it's still going. This system's
    SCSI card, as I understand it, has a burst transfer rate of 40MB/s.
    The hard drives are capable of 27MB/sec at a minimum. I have cloned
    other Ultra 60's with 36GB drives and I don't remember the process
    taking nearly as long. What could be the problem? Is it the hard
    disk I am cloning?

  • Next message: Scott Howard: "Re: Why does dd take so long on my Ultra 60"

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    • Why does dd take so long on my Ultra 60
      ... I am trying to clone a 36GB Seagate ST336704LC using dd. ... starting to fail, so I want to replace it as soon as possible. ... The hard drives are capable of 27MB/sec at a minimum. ... disk I am cloning? ...
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