What kind of hard drive is it? Seagate is having some firmware struggles lately...
On Sun, Jan 18, 2009 at 8:34 AM, lrhorer <[email protected]> wrote: > > I am having a problem with performance of the drive system on a Debian > "Lenny" distro. This is running RAID under mdadm with a reiserfs file > system on a raw partition. The kernel is 2.6.26-1-amd64 running on an > AMD Athlon 64 x 2 CPU with 4G of RAM. Ordinarily, performance is > quite good, and I have transferred files as fast as 480 Mbps upon > occasion. Frequently, however, drive access will drop to dead zero > for about 40 seconds. The trigger event seems to be file creation, > and I don't believe it usually happens unless a file is being > created. It does not happen every time a file is created, but for > example I have a script which performs a number of tests and checks > and at the end creates a log file. When the script reaches that > point, it often hangs, and if there are any network file transfers > going on in the background (there usually are), the network > utilization drops right off to almost zilch. Another common trigger > is editing a video on one of the served Windows workstations. At some > point the edit parameters are saved in a cut file. When the user > first selects the "Save Project" utility, the file write often hangs > for about 40 seconds. Sometimes Windows will report the drive is > full, or a timeout has occurred. I do not know for a fact that drive > - drive transfers are suspended, but NFS, SAMBA, FTP, and other > network transfers in both directions are abrupted for a period of > about 40 seconds. Non-drive related transfers, or transfers to > devices other than the RAID array are not impacted. There is nothing > in any of the logs to suggest anything at all has happened. > Interestingly enough, although Windows sometimes complains, ordinary > TCP transfers do not time out, despite the fact not a single byte > transfers in either direction during the event. > > What can I do to try to find out what is hanging and why? > > > -- Daniel --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Linux Users Group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] For more options, visit our group at http://groups.google.com/group/linuxusersgroup -~----------~----~----~----~------~----~------~--~---
