Date: Tue, 18 Nov 2008 19:29:37 +0200 From: Andriy Gapon <avg@icyb.net.ua> To: Marcel Moolenaar <xcllnt@mac.com> Cc: freebsd-fs@freebsd.org, freebsd-geom@freebsd.org Subject: Re: zfs: affected by geom_(mbr|bsd) => geom_part_(mbr|bsd) ? Message-ID: <4922FB81.50608@icyb.net.ua> In-Reply-To: <93FC5F5D-91CD-450B-B08D-5C5EC5A1C880@mac.com> References: <4911C3E9.405@icyb.net.ua> <49198A1A.3080600@icyb.net.ua> <B6997A5A-1B56-4325-A24A-EF90AF8C6A6A@mac.com> <49227875.6090902@icyb.net.ua> <93FC5F5D-91CD-450B-B08D-5C5EC5A1C880@mac.com>
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I just remembered that I saved old zpool.cache file before "migrating"
the pool.
I looked at the diff of hexdumps and there are a number of differences,
it's hard to understand them because the file is binary (actually it
seems to contain serialized name-value pairs), but one difference is
prominent:
...
00000260 64 65 76 69 64 00 00 00 00 00 00 09 00 00 00 01
|devid...........|
...
-00000270 00 00 00 15 61 64 3a 47 45 41 35 33 34 52 46 30
|....ad:GEA534RF0|
-00000280 54 4b 33 35 41 73 31 73 33 00 00 00 00 00 00 28
|TK35As1s3......(|
...
+00000270 00 00 00 11 61 64 3a 47 45 41 35 33 34 52 46 30
|....ad:GEA534RF0|
+00000280 54 4b 33 35 41 00 00 00 00 00 00 28 00 00 00 28
|TK35A......(...(|
...
It looks like old "devid" value is "ad:GEA534RF0TK35As1s3" and new one
is "ad:GEA534RF0TK35A". Just a reminder: actual zpool device is ad6s2d.
The new value is what is reported by diskinfo:
$ diskinfo -v ad6
ad6
...
ad:GEA534RF0TK35A # Disk ident.
$ diskinfo -v ad6s2
ad6s2
...
ad:GEA534RF0TK35A # Disk ident.
$ diskinfo -v ad6s2d
ad6s2d
...
ad:GEA534RF0TK35A # Disk ident.
Hmm, "indent" is reported to be the same for all three entities.
I don't remember what diskinfo reported with pre-gpart kernel, but I
suspect that it was something different.
Could anybody please check this? (on 7.X machine without GEOM_PART).
I quickly glimpsed through sources and it seems that this comes from
DIOCGIDENT GEOM ioctl i.e. "GEOM::ident" attribute. It seems that
geom_slice.c code has some special handling for that.
--
Andriy Gapon
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