Hello list I've been having a problem with amanda and gzip on my debian backup servers for a while now. I do my backups with gzip compression, and they seem to go fine. However, upon verifying the backups, I notice gzip errors. I get two different kinds of errors: "crc" errors and "format violated" errors. The errors don't happen on all dump images, usually just the bigger ones (which means level 0's, which means I'm screwed for restores!). I've had them crop up from 300 MB into the image to 10 GB into it, and anywhere in between. At least one gzipped image fails on every backup.
I installed a second Debian backup server, and it had the exact same problem right after installation. I re-did my backup server on a different hard disk, and still had the problem. I had been using a security-updated gzip, so I tried the pre-security gzip, but had the same problem. I tried manually gzipping and unzipping images on the backup server without using amanda at all, and had the same problem. "Aha!" you say, it must not be amanda then. Well... maybe. I tried a fresh debian install with just the base system on it which includes gzip. I created a 20 GB tar file, gzipped and gunzipped it, and had no errors. The only link between all these boxes with gzip problems is that the Debian amanda-server package was installed. Anyone else noticed this problem? And fixed it? -- Kurt Yoder Sport & Health network administrator
