Re: Skipping fsck during boot with systemd?
On Dec 13, 2014, at 4:40 PM, Patrick Bartek <firstname.lastname@example.org> wrote:
> 15 seconds extra, a couple times a year isn't all THAT bad.
> FWIW, I think I found out why ext4 fsck's faster than ext3 (or the other
> exts). Seems ext4 only checks the part of the filesystem that's been
> used/writtento/etc. instead of the entire filesystem/partition.
Yes, that’s the secret sauce. There was a paper (in Usenix FAST, I think) about what’s new in ext4.
My own experience is with ext4 filesystems of up to 6 TB. The application is radio station automation. A half hour show is about 600GB, so lots of very big files. Total time to do a full fsck is under two minutes. It can be nerve-wracking when the station is down because the server decided to reboot and do an fsck, but it’s *way* better than it used to be with ext3!