system hangs during dump + compress > usb2-drive
jguojun at sbcglobal.net
Sun Sep 30 05:49:58 UTC 2012
In FreeBSD 8.3 release (possibly in earlier release), dump a file system has
2-3GB or more
content can cause system hang in a specific case (pipe to compression):
dump FS-on-SATA-drive > usb-drive OK
dump FS-on-SATA-drive | anyCompress > sata-drive OK
mv a-large-dump-file from STAT drive to a USB drive OK
dump small-FS-on-SATA-drive | anyCompress > usb-drive OK
small -- 1.8GB or less
dump large-FS-on-SATA-drive | anyCompress > usb-drive hang
content is 3GB or larger (did not try around 2GB yet)
When system hangs, no sub system, such video, network, etc, will function.
Typically, the unfinished compressed dump file is around 1.5-2.7GB, so
guessing dumped file content is close to
or over 2GB when failure occurred.
Has anyone encountered the same problem?
Because this usually takes a few hours to occur, this is hard to watch
how/when it happens.
Is any way to debug or determine what status the system is?
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