February 13, 201115 yr Hi , I've found old 250GB IDE WD Cavaier HD. I wander to add it as cache drive. Currently my NAS setup is that sabnzbd download all tv shows to /mnt/user/TV which is located on disk2. What will adding a cache drive benefit me in this case? Is IDE drive good or bad idea when all my NAS is SATA ?
February 13, 201115 yr I have a 500gb 7200rpm Hitachi IDE drive set up as a cache drive and it has increased my write performance, I can't remember the exact figures but I think it was about 50% faster.
February 13, 201115 yr Author Thank you. Ill try adding one today. Will my NAS rebuild everything again ?
February 13, 201115 yr There is nothing to rebuild. Add the cache and then select Use cache disk: Yes for the desired shares. Your writes will go to the cache drive until its full. The mover script will run at night moving cached files in to array.
February 13, 201115 yr I'm having problems with the mover script moving files to disk2, (disk1 is full). The syslog says that the drive is full even though disk 2 is empty. If I disable the cache drive for the share, the files are then copied to the empty disk. I think I will stop using it for now as it's given me a very painful headache :'(
February 13, 201115 yr I'm having problems with the mover script moving files to disk2, (disk1 is full). The syslog says that the drive is full even though disk 2 is empty. If I disable the cache drive for the share, the files are then copied to the empty disk. I think I will stop using it for now as it's given me a very painful headache :'( You probably did not set the min-free config field on both the cache drive and the user-share. It is in kilobytes, and it should be roughly twice the size of the largest file you write to the server. If you do not set it, and if there is even one byte free on the cache drive the initial empty file will be created on the cache drive and it will fill and not be able to hold the entire file. You'll then get the disk-full message. The same goes for the user-share. If you do not see the min-free setting it too will attempt to use a nearly full disk before switching to a second disk. (and fail because the full size of the file being copied will not fit) Joe L.
February 13, 201115 yr Thanks Joe. I had set the minimum file size on the cache drive but not the share, I'll try it again tomorrow.
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