Eponymous

Excluding directories while using pax(1)
My primary disk is failing. There are large segments that are generating low level IO errors during read or write operations. Most of the files written to the bad area were under /usr/ports/ where the FreeBSD Ports collection is installed. A few files were under the web server's root.

Figuring I'd take care of things prior to the disk actually failing to the point of it being irrecoverable, I purchased a new disk early. I installed it, partitioned it, and formatted it.

To copy the data over, ignoring the areas that were causing the IO errors, I used mv to "move" the files from the web root under /usr/ports and used the following command as root:

pax -rwvpe -s':/usr/ports/.*::gp' -X / /mnt/newdisk/

The -X prevents pax from traversing into mount points that have a different device ID than the one on which it was started. This prevents an infinitely recursive loop from happening when the new disk's mount point would have been hit. It also prevents data on the non-failing disks from being copied as well.
the -s option allows for sed search and replace scripts to be run. In this example, the : is used as the delimiter and any path matching /usr/ports/* is replaced by a null string. With this replacement all directories under /usr/ports are excluded from the copy.

[/unix] [permanent link]

Eponymous

	About My Infrequently Updated Blog. The web-based journal of M. Forde, computer nerd, endurance athlete, and DeLorean owner contact Subscribe Subscribe to a syndicated feed of my weblog, brought to you by the wonders of RSS. Flavors There's more than one way to view this weblog; try these flavors on for size. index circa 1993 Sections main musings running DeLorean code unix album TBM Archives 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 Disclaimers, Copyrights, Privacy, Etc. ToS Copyrights Links olix0r.net netmeister.org Giraffes Eat. Run. Sleep.	16 May 2015 *It was a good day...* So today I woke up and watched an episode of Star Trek while I did some weight training and core work. Then I met my friend and her 5-month old baby for breakfast. That baby is so cute, and so happy too. After that I met another friend for a run in the Tourne where we met a fox on the Red Trail. When I got home from the run, I turned my lawn into an avant garde art installation and then took a shower. I took Ailsing out for a drive and on the way home she rolled over to 15,000 miles. I've had the DeLorean for about five years now, so I'm still averaging 1,000 miles per year. Not bad. A large part of a tree fell and missed my house by about 18 inches. So then I went and ran another Six miles during a National Weather Service tornado watch. Now I'm finishing up the day with a good movie and a glass of Monk's Blood. Today, I didn't even have to use my AK. It was a good day. [/musings] [permanent link]

Eponymous

	About My Infrequently Updated Blog. The web-based journal of M. Forde, computer nerd, endurance athlete, and DeLorean owner contact Subscribe Subscribe to a syndicated feed of my weblog, brought to you by the wonders of RSS. Flavors There's more than one way to view this weblog; try these flavors on for size. index circa 1993 Sections main musings running DeLorean code unix album TBM Archives 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 Disclaimers, Copyrights, Privacy, Etc. ToS Copyrights Links olix0r.net netmeister.org Giraffes Eat. Run. Sleep.	21 Jun 2013 Excluding directories while using pax(1) My primary disk is failing. There are large segments that are generating low level IO errors during read or write operations. Most of the files written to the bad area were under /usr/ports/ where the FreeBSD Ports collection is installed. A few files were under the web server's root. Figuring I'd take care of things prior to the disk actually failing to the point of it being irrecoverable, I purchased a new disk early. I installed it, partitioned it, and formatted it. To copy the data over, ignoring the areas that were causing the IO errors, I used mv to "move" the files from the web root under /usr/ports and used the following command as root: pax -rwvpe -s':/usr/ports/.::gp' -X / /mnt/newdisk/ The -X prevents pax from traversing into mount points that have a different device ID than the one on which it was started. This prevents an infinitely recursive loop from happening when the new disk's mount point would have been hit. It also prevents data on the non-failing disks from being copied as well. the -s option allows for sed search and replace scripts to be run. In this example, the : is used as the delimiter and any path matching /usr/ports/ is replaced by a null string. With this replacement all directories under /usr/ports are excluded from the copy. [/unix] [permanent link]