| Marshall Kirk McKusick. Fsck---The Unix File System Check Program. Computer Systems Research Group, UC Berkeley, 1985. |
....seconds 21 minutes Table 3.2: Reboot steps and timings These are more detailed explanations on each item, in decreasing order of significance. Fast fsck The largest amount of time the machine takes after a crash is spent running fsck, the UNIX file system consistency check and repair program [McK85] It takes about 20 minutes to run fsck on our 15 disk striped arrays. In the past, fsck checked all the filesystems during every reboot, but in recent versions of UNIX, this has become only a problem after an unclean shutdown fsck will check the filesystem flags and will take no further ....
Marshall Kirk McKusick. Fsck - The UNIX File System Check Program. 4.2BSD, Computer Systems Research Group, UC Berkeley, 1985.
....array case. 6.3.3 Fast fsck. It is important to reduce the time required for rebooting the system in order to minimize the window of vulnerability. We have implemented some methods outlined in Mary Baker s Ph.D. thesis[23] but the largest amount of time taken on a reboot has always been the fsck[27] time. It takes about 20 minutes to run on our 15 disk striped arrays after a system crash. Dr. McKusick, the author of fsck, has been working on a project called soft updates , in which by changing the way dirty data is written to the BSD filesystem, the performance and reliability improves ....
Marshall Kirk McKusick. Fsck - The UNIX File System Check Program. In 4.4 BSD System Manager's Manual. O'Reilly & Associates, 1994.
.... complicated than Unix FFS[9] Sprite LFS has additional complexity for the segment cleaner, but this is compensated by the elimination of the bitmap and layout policies required by Unix FFS; in addition, the checkpointing and rollforward code in Sprite LFS is no more complicated than the fsck code[15] that scans Unix FFS disks to restore consistency. Logging file systems like Episode[2] or Cedar[3] are likely to be somewhat more complicated than either Unix FFS or Sprite LFS, since they include both logging and layout code. In everyday use Sprite LFS does not feel much different to the users ....
Marshall Kirk McKusick, Willian N. Joy, Samuel J. Leffler, and Robert S. Fabry, "Fsck - The UNIX File System Check Program," Unix System Manager's Manual - 4.3 BSD Virtual VAX-11 Version, USENIX, (Apr 1986).
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Marshall Kirk McKusick. Fsck---The Unix File System Check Program. Computer Systems Research Group, UC Berkeley, 1985.
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Marshall Kirk McKusick. Fsck -- the unix file system check program. July 16, 1985.
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