RE: Slow recover speeds was amrecover failures

2006-07-11 Thread Jerlique Bahn
Yes, it will do a read of the entire tape. There is a config file option called amrecover_do_fsf that if set to true will fsf your tape to the correct spot if your drive supports it, which is much faster than a linear read. I do have that set, and the drive finished up in about 1 hour. It

RE: Slow recover speeds was amrecover failures

2006-07-11 Thread Cyrille Bollu
Contention on the disk, especially if it is also used for other tasks, and compounded if inparallel is set very high. RAID5 is often not high-performance. I've seen some that do well on a single read or write, but seriously degrade with a few simultaneous operations. Either way, if

RE: Slow recover speeds was amrecover failures

2006-07-11 Thread Jerlique Bahn
Hello, Ok, I have increased tapebufs to 80, I'm not really sure how high to increase it though. I do have plenty of free ram. I've increased it to 1024 on my PowerEdge 2850 with 8GB RAM. Ok wow that's a huge increase. I'll keep trying smaller increments until I get the error and then

Re: Slow recover speeds was amrecover failures

2006-07-11 Thread Paul Bijnens
On 2006-07-11 14:13, Jerlique Bahn wrote: Just a thought: Were you sitting next to the tape drive while running the above test? Did you see it stopping and re-starting over and over...? Yes it is starting and stopping at frequent intervals. I recompiled amanda with --with-buffered-dump to

Re: Slow recover speeds was amrecover failures

2006-07-11 Thread Jon LaBadie
On Tue, Jul 11, 2006 at 09:07:32PM +0930, Jerlique Bahn wrote: Yes, it will do a read of the entire tape. There is a config file option called amrecover_do_fsf that if set to true will fsf your tape to the correct spot if your drive supports it, which is much faster than a linear read.

Slow recover speeds was amrecover failures

2006-07-10 Thread Jerlique Bahn
Hi Frank, ## This is from the changer.debug MT - /usr/local/amanda/sbin/ammt -f DD - /usr/local/amanda/sbin/amdd Args - -slot next - rewind /dev/nsa0 /dev/nsa0 rewind failed: Permission denied Looks like this is your main problem, you don't have permissions to the tape drive.