Marcelo,
I just finished writing up my test results. Hopefully it will answer
most of your questions. You can find it in my blog, as permalink
http://blogs.sun.com/blogfinger/entry/zfs_and_the_uberblock_part
Regards,
Bernd
Marcelo Leal wrote:
>> Marcelo,
> Hello there...
>> I did some more
Marcelo,
I did some more tests.
I found that not each uberblock_update() is also followed by a write to
the disk (although the txg is increased every 30 seconds for each of the
three zpools of my 2008.11 system). In these cases, ub_rootbp.blk_birth
stays at the same value while txg is incremen
Marcelo,
the problem which I mentioned is with the limited number of write cycles
in flash memory chips. The following document published in June 2007 by
a USB flash drive vendor says the guaranteed number of write cycles for
their USB flash drives is between 10.000 and 100.000:
http://www.cor
Hi,
After I published a blog entry about installing OpenSolaris 2008.11 on a
USB stick, I read a comment about a possible issue with wearing out
blocks on the USB stick after some time because ZFS overwrites its
uberblocks in place.
I tried to get more information about how updating uberblocks
