Greetings to everyone.
I'm trying to retrieve the checksumming algorithm on a per-block basis
with zdb(1M). I know it's supposed to be ran by Sun's support
engineers only & I take full responsibility for whatever damage I
cause to my machine by using it.
Now.
I created a tank/test filesystem, dd'ed some files, then changed the
checksum to sha256 and dd'ed some more files. I retrieved the DVAs of
all the files and wanted to verify that some of them are using the
default and the rest the sha256 checksums. The problem is that zdb -R
either returns (null), meaning that printf() has been given a NULL
pointer or it returns corrupt data and there are cases where it works
ok. This is a case where it fails:
$ zdb -R tank:0:f076d8600:7a00:b
Found vdev type: mirror
DVA[0]: vdev_id 1199448952 / 4315c6bdf768bc00
DVA[0]: GANG: TRUE GRID: 00bd ASIZE: eb45ac00
DVA[0]: :1199448952:4315c6bdf768bc00:a75a00:egd
DVA[1]: vdev_id 1938508981 / e19c60208f39cc00
DVA[1]: GANG: TRUE GRID: 005d ASIZE: 11fe4ac00
DVA[1]: :1938508981:e19c60208f39cc00:a75a00:egd
DVA[2]: vdev_id 1231513852 / 646586e9b6609400
DVA[2]: GANG: FALSE GRID: 00e6 ASIZE: 15e953200
DVA[2]: :1231513852:646586e9b6609400:a75a00:edd
LSIZE: 6efc00 PSIZE: a75a00
ENDIAN: BIG TYPE: (null)
BIRTH: 2a9513965f18afd LEVEL: 24 FILL: 85adfa322e48a796
CKFUNC: (null) COMP: (null)
CKSUM:
7408c0516468b934:a0f29a7c28b6c319:28280aab19d1ad3c:64607350c7ea256c
$
Is it a zdb deficiency of my input is to blame?
Thank you for considering.
Best regards,
Stathis Kamperis
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