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Date:      17 Mar 2002 20:00:49 +0000
From:      Harry Newton <harry_newton@telinco.co.uk>
To:        freebsd-stable@freebsd.org
Subject:   DVD large files access problems ( READ_BIG )
Message-ID:  <868z8r0xsj.fsf@basilisk.locus>

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Trying to get a large file from a dvd gives me a few problems:

  (105)% pwd
  /a/dvd/CVS-REPO
  (106)% ls -l NetBSD.tgz  
  -r--r--r--  1 root  wheel  441037396 Feb  7 01:48 NetBSD.tgz
  (107)% cp NetBSD.tgz /tmp
  cp: NetBSD.tgz: Input/output error
  (108)% 

and the following appears in /var/log/messages ( repeated many times ):

  Mar 17 19:46:24 basilisk /kernel: acd1: READ_BIG - ABORTED COMMAND asc=48 ascq=0
  0 error=00

I get the same problems with cat(1) and dd(1). If I set the block size
with dd to 4k then I will get the file transferred eventually, but it
is very slow ( ~ 18k / sec ). I can also transfer stuff with cat(1)
but again this is very slow.

?? --> Any ideas what's going on ?

(85)% uname -a
FreeBSD basilisk.locus 4.5-STABLE FreeBSD 4.5-STABLE #0: Sat Mar 16
20:08:45 GMT 2002     harry@basilisk.locus:/usr/obj/usr/src/sys/BASILISK  i386
(86)% dmesg | grep -i dvd
acd1: DVD-ROM <Pioneer DVD-ROM ATAPIModel DVD-106S 0122> at ata2-master using PIO4
(87)% 

Cheers,

 - Harry

P.S. The DVD in question is the FeeBSD Services' product, which I
would recommend without hesitation.

--
Harry Newton
harry_newton at telinco . co . uk
www . gaudeamus . telinco . co . uk / html / gpg . html

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