ZFS_DEBUG_MODIFY activation

[Marty]

Hi guys,
I would like to use ZFS_DEBUG_MODIFY flag for my ZFS pool.What file needs to be edited? Thank you for your help.

[raulfg3]

You need to use CLI or shell an modify desired flag.

zfs set: https://www.freebsd.org/cgi/man.cgi?zfs%288%29


and please tell us why you need so strange thing.

[Marty]

You need to use CLI or shell an modify desired flag.

zfs set: https://www.freebsd.org/cgi/man.cgi?zfs%288%29


and please tell us why you need so strange thing.

It can reduce possiblity of problem with ZFS and non-ECC RAM

http://arstechnica.com/civis/viewtopic. ... #p26303271

[Marty]

So that...it is correct form of command?

zfs set ZFS_DEBUG_MODIFY=on

[raulfg3]

I never have problem with non ECC RAM and board.

My point is:

1 if I store only internet download video & Music, ECC is not needed, you can always download a working version of your favorite film / series /music.
2 if you want to store valuable data like personal photos , do not store only in one site, use Dropbox, and other simmilar services, so Why you need ECC?.
3 If you really need ECC, to avoid data corruption, USE ECC and Board that support it, do not use workarrounds and normal boards, use proffesional grade motherboard with ECC.

[erik]

In system/advanced/sysctl.con set vfs.zfs.debug to 0x10
And issue the command sysctl vfs.zfs.debug to see if the value is accepted
If not set it manually to check it this works

Code: Select all

sysctl vfs.zfs.debug=0x10

This will enable the in memory checksumming to reduce the chance of an unnoticed buffer corruption.

[raulfg3]

Thanks a lot erik, and sorry that my answer do not work, I strike the post to avoid confusion.