[DRBD-user] slow sync speed of 12TB over 10GE

Michael Moody michael at gsc.cc
Tue Jan 13 01:02:42 CET 2009

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


Separate subject, but with a software RAID that large, a few things:

If you even need a rebuild, it will take FOREVER. Make sure to turn on write intent bitmapping: mdadm -G /dev/mdx -b internal

http://ubuntumagnet.com/2008/01/write-intent-bitmaps-md-devices

Also, there are others with similar issues: http://osdir.com/ml/linux.gentoo.cluster/2006-12/msg00021.html (regarding drbd and software raid)

The recommendation is to move the metadata as others have said: http://osdir.com/ml/linux.gentoo.cluster/2006-12/msg00023.html

Michael
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