Date: Sun, 16 Oct 2016 21:56:10 +0500 From: "Eugene M. Zheganin" <emz@norma.perm.ru> To: "stable@freebsd.org" <stable@freebsd.org> Subject: zfs/raidz: seems like I'm failing with math Message-ID: <fa71cc53-83f3-2315-d047-36679700dd18@norma.perm.ru>
next in thread | raw e-mail | index | archive | help
Hi.
FreeBSD 11.0-RC1 r303979, zfs raidz1:
===Cut===
# zpool status gamestop
pool: gamestop
state: ONLINE
scan: none requested
config:
NAME STATE READ WRITE CKSUM
gamestop ONLINE 0 0 0
raidz1-0 ONLINE 0 0 0
da0 ONLINE 0 0 0
da1 ONLINE 0 0 0
da2 ONLINE 0 0 0
da3 ONLINE 0 0 0
da4 ONLINE 0 0 0
da5 ONLINE 0 0 0
===Cut===
6 disks 960 Gbs each:
===Cut===
# smartctl -a /dev/da0
smartctl 6.5 2016-05-07 r4318 [FreeBSD 11.0-RC1 amd64] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Samsung based SSDs
Device Model: SAMSUNG MZ7KM960HAHP-00005
Serial Number: S2HTNX0H507466
LU WWN Device Id: 5 002538 c402bdac1
Firmware Version: GXM1003Q
User Capacity: 960 197 124 096 bytes [960 GB]
Sector Size: 512 bytes logical/physical
[...]
===Cut===
But:
===Cut===
# zpool list gamestop
NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT
gamestop 5,22T 4,38T 861G - 24% 83% 1.00x ONLINE -
===Cut===
Why 5.22T ? If zpool is displaying raw size, it should be 960 x 6 = 5760
Gb = 5.65 T. If it's displaying the actual data, then it should be 960 x
5 = 4800 Gb = 4.68 T. 5.22 T is neither of these. I'm stuck, please
explain. :)
Thanks.
Eugene.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?fa71cc53-83f3-2315-d047-36679700dd18>