Re: External USB hard drive problems...
From: Eugene Nine (nospam_at_columbus.rr.com)
Date: 10/11/03
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Date: Sat, 11 Oct 2003 04:26:18 GMT
Greg wrote:
> I am trying to use an external IDE HD plugged into a USB port for backups.
> I have chosen a WD 120Gb and RH9 recognises it as /dev/sda1
>
> I do fdisk and create the 120Gb partition OK, but when I do a:
>
> mkfs.ext3 /dev/sda1
>
> it creates the first 91 inode tables almost instantly and then it slows
> down to a crawl, doing 1 every couple of minutes. Then it will suddenly
> instantly do 5 or 10 and then slow down to a crawl again. It finally
> completes the 895 in about three quarters of an hour:
>
> ======================================================================= #
> mkfs.ext3 /dev/sda1
> mke2fs 1.32 (09-Nov-2002)
> Filesystem label=
> OS type: Linux
> Block size=4096 (log=2)
> Fragment size=4096 (log=2)
> 14663680 inodes, 29304560 blocks
> 1465228 blocks (5.00%) reserved for the super user First data block=0 895
> block groups
> 32768 blocks per group, 32768 fragments per group 16384 inodes per group
> Superblock backups stored on blocks:
> 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632,
> 2654208, 4096000, 7962624, 11239424, 20480000, 23887872
>
> Writing inode tables: 96/895
>
> =======================================================================
>
> After this completes, I can mount the drive and use rsync to write to it
> with no errors, no speed issues and no apparent problems. :-)
>
> However:
>
> When I re-run rsync to update the backups I get many errors, saying files
> don't exist. On further inspection I find that the file that it is looking
> for is ".thisisthefile", when the file backed up is "thisisthefile".
> However, many files names are correct (without the dot) and there are no
> errors when reading/writing to them. Huh?
>
> I try and rename the file with mv and it says that there is no space left
> on the device. I do a df and find that I have only used about 30Gb of the
> 120Gb total. It seems as though this is a default error message as the OS
> is having trouble talking to the USB subsystem.
>
> I can create a file on the mounted /dev/sda1 with vi or touch with no
> problems, in spite of the "no space" error.
>
>
> All of this seems to point to some sort of HD/Controller/Interface type
> issue. I have 2 of these external WD drives and I have tried both of them
> and they both react the same way. The motherboard is an ASUS P4P800 with
> USB2 ports. I can't use hdparm to talk to the drive as Linux thinks that
> the USB drive is a SCSI drive. I understand that a 120Gb-sized partition
> can be easily accommodated by the 2.4.20-13.9 kernel.
>
> If you think that I am nonplussed, you would be correct!! :-)
>
> Does anyone have ANY IDEA what is going on????
>
> Cheers,
> Brad
Mine does similar. I can start copying files and it will slow down and
report stalled. I think it has something to do with the speed difference
between the internal and external drives.
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