A difficult one here re: Linux...

[lisaj]

This might be tricky given the technical complexity of the problem, but it's worth a shot: I have a Linux server that's recently taken to writing data very slowly indeed. Whether the data is transferred over FTP or Samba, and irrespective of the drive being written to, data can be read at about 12Mb/s, but only written at 600K/s. I'm out of ideas - anybody else got any?

[manfredini]

possibly a setting thats been changed which limits the speed of the write? Do the different drives have extremely different characteristics? ie. capacity, space free, manufacturer, speed etc?

[lisaj]

Well... all the drives are identical Maxtor 120Gb drives. Eight are arranged in a RAID array of 1TB, and a ninth is arranged for home drives and system files. I've checked the raw read/write speeds directly on the system and they're fine, so I'm now thinking it could be a duplex error on the network interface. I've recently had to drop out a switch and I've temporarily replaced it with a duplex hub whislt I'm waiting for the replacement switch to be delivered. However, the problem with this theory is that I'm getting no duplex related error messages, nor does the hub complain that the link isn't running at full speed...

[manfredini]

nightmare.... The only thing that i can come up with from what i know of the situation is that the hub might be limited to these speeds for some reason, possibly a hardware interface issue or something, this would explain the absence of error messages as the hub would be running within expected tolerances. possibly check the logs or config file for information? don't know much else that could help....sorry