Re: pitiful performance of an SATA150 drive

Marc Santhoff wrote:

Am Montag, den 26.03.2007, 14:36 -0400 schrieb Mikhail Teterin:


Over a year later this remains a problem -- exactly as described below...

No other SATA devices are present -- the only other IDE device is the DVD drive. My main disks are SCSI.

What's MUCH worse is that the (slowly) written data is also often corrupted... I use the drive to store our vast collection of photos and the backups. Every once in a while I encounter a corrupt JPEG file, and the backups are _always_ corrupt somewhere. Doing something like:

dump 0auChf 16 0 - /home | bzip2 -9 > /store/home.0.bz2

always produces a corrupt file (as per ``bzip2 -t''). I used to blame the drive's temperature, but it now sits in its own enclosure and stays under 40 Celsius.

When the drive is accessed, there are (according to `systat -vm') many thousands of interrupts 17 -- on my system these are shared between pcm0 and ehci0. Why are these triggered by accessing SATA is unclear, but the Intr's share of the CPU time is often above 80% of one processor's total (I have 4 processors).

As I mentioned a year ago, Knoppix was accessing the same drive at much higher speeds, so I don't believe, the problem is with the hardware...

Please, advise. Thanks!



FWIW: You could try cleaning the connectors and use a fresh new cable
for the connection (the spec has a very small value for plugging the
connectors at the cable).


Are you referring to how many time the cable can be plugged in and removed? If so
what is the number?

Thanks,
Steve

I had massive problems and got rid of them that way ...

Marc


_______________________________________________
freebsd-stable@xxxxxxxxxxx mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-stable
To unsubscribe, send any mail to "freebsd-stable-unsubscribe@xxxxxxxxxxx"





--

"They that give up essential liberty to obtain temporary safety, deserve neither liberty nor safety." (Ben Franklin)

"The course of history shows that as a government grows, liberty decreases." (Thomas Jefferson)



_______________________________________________
freebsd-stable@xxxxxxxxxxx mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-stable
To unsubscribe, send any mail to "freebsd-stable-unsubscribe@xxxxxxxxxxx"

Relevant Pages

  • Re: pitiful performance of an SATA150 drive
    ... No other SATA devices are present -- the only other IDE device is the DVD ... once in a while I encounter a corrupt JPEG file, ... As I mentioned a year ago, Knoppix was accessing the same drive at much higher ... why are you using cat under FreeBSD, ...
    (freebsd-stable)
  • Re: pitiful performance of an SATA150 drive
    ... No other SATA devices are present -- the only other IDE device is the DVD drive. ... Every once in a while I encounter a corrupt JPEG file, and the backups are _always_ corrupt somewhere. ... On Wednesday 01 March 2006 11:07, Mikhail Teterin wrote: ... why are you using cat under FreeBSD, ...
    (freebsd-stable)
  • Re: pitiful performance of an SATA150 drive
    ... No other SATA devices are present -- the only other IDE device is the DVD ... once in a while I encounter a corrupt JPEG file, ... You could try cleaning the connectors and use a fresh new cable ... I had massive problems and got rid of them that way ... ...
    (freebsd-stable)
  • Re: registry error
    ... Windows could not start because the following file is missing or corrupt: ... I dont have the original disk with windows xp as it came pre-installed. ... They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety. ...
    (microsoft.public.windowsxp.help_and_support)
  • Thailand - coup reports coming through -
    ... Thai PM Thaksin Siniwatra who is widely believed to be corrupt. ... Will this be the end of Thai's famous girl bars, ... "We may acquire liberty, but it is never recovered if it is once lost" ...
    (uk.politics.misc)