From: bugzilla-daemon@bugzilla.kernel.org
To: linux-ext4@vger.kernel.org
Subject: [Bug 47151] New: provide a file system block size of 8KB for certain SSDs.
Date: Thu, 6 Sep 2012 20:34:16 +0000 (UTC) [thread overview]
Message-ID: <bug-47151-13602@https.bugzilla.kernel.org/> (raw)
https://bugzilla.kernel.org/show_bug.cgi?id=47151
Summary: provide a file system block size of 8KB for certain
SSDs.
Product: File System
Version: 2.5
Kernel Version: 3.4.6-2.10-default
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: enhancement
Priority: P1
Component: ext4
AssignedTo: fs_ext4@kernel-bugs.osdl.org
ReportedBy: estellnb@elstel.org
Regression: No
Sandisk support says that its 480GB SSDs have a block size of 8KB instead of
the usual 4KB. Thus in order to use that SSD we would have to format with a
block size of 8KB. As SSDs get bigger and bigger it is likely that also other
vendors will sell SSDs with a block size of 8KB. Please look forward to
supporting an ext4 blocksize of 8KB!
# mkfs.ext4 -b 8192 test.disk
Warning: blocksize 8192 not usable on most systems.
mke2fs 1.42.4 (12-June-2012)
test.disk is not a block special device.
Proceed anyway? (y,n) y
mkfs.ext4: 8192-byte blocks too big for system (max 4096)
Proceed anyway? (y,n) y
Warning: 8192-byte blocks too big for system (max 4096), forced to continue
Discarding device blocks: done
Filesystem label=
OS type: Linux
Block size=8192 (log=3)
Fragment size=8192 (log=3)
Stride=0 blocks, Stripe width=0 blocks
1280 inodes, 1280 blocks
64 blocks (5.00%) reserved for the super user
First data block=0
1 block group
65528 blocks per group, 65528 fragments per group
1280 inodes per group
Allocating group tables: done
Writing inode tables: done
Filesystem too small for a journal
Writing superblocks and filesystem accounting information: done
# mount -o loop test.disk /mnt/
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
# dmesg | tail
[ 2020.657698] SFW2-INext-DROP-DEFLT IN=eth0 OUT=
MAC=33:33:00:00:00:fb:44:d8:84:61:8c:33:86:dd
SRC=fe80:0000:0000:0000:46d8:84ff:fe61:8c33
DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=227 TC=0 HOPLIMIT=255 FLOWLBL=0
PROTO=UDP SPT=5353 DPT=5353 LEN=187
[ 2020.657874] SFW2-INext-DROP-DEFLT IN=eth0 OUT=
MAC=33:33:00:00:00:fb:44:d8:84:61:8c:33:86:dd
SRC=fe80:0000:0000:0000:46d8:84ff:fe61:8c33
DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=227 TC=0 HOPLIMIT=255 FLOWLBL=0
PROTO=UDP SPT=5353 DPT=5353 LEN=187
[ 2020.696054] SFW2-INext-DROP-DEFLT IN=eth0 OUT=
MAC=33:33:00:00:00:fb:44:d8:84:61:8c:33:86:dd
SRC=fe80:0000:0000:0000:46d8:84ff:fe61:8c33
DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=227 TC=0 HOPLIMIT=255 FLOWLBL=0
PROTO=UDP SPT=5353 DPT=5353 LEN=187
[ 2020.992554] SFW2-INext-DROP-DEFLT IN=eth0 OUT=
MAC=33:33:00:00:00:fb:44:d8:84:61:8c:33:86:dd
SRC=fe80:0000:0000:0000:46d8:84ff:fe61:8c33
DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=431 TC=0 HOPLIMIT=255 FLOWLBL=0
PROTO=UDP SPT=5353 DPT=5353 LEN=391
[ 2045.224133] SFW2-INext-DROP-DEFLT IN=eth0 OUT=
MAC=33:33:00:00:00:fb:44:d8:84:61:8c:33:86:dd
SRC=fe80:0000:0000:0000:46d8:84ff:fe61:8c33
DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=142 TC=0 HOPLIMIT=255 FLOWLBL=0
PROTO=UDP SPT=5353 DPT=5353 LEN=102
[ 2188.427869] SFW2-INext-DROP-DEFLT IN=eth0 OUT=
MAC=33:33:00:00:00:fb:00:1b:63:2f:5e:93:86:dd
SRC=fe80:0000:0000:0000:021b:63ff:fe2f:5e93
DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=111 TC=0 HOPLIMIT=255 FLOWLBL=0
PROTO=UDP SPT=5353 DPT=5353 LEN=71
[ 2188.429149] SFW2-INext-DROP-DEFLT IN=eth0 OUT=
MAC=33:33:00:00:00:fb:00:80:77:d8:ee:7d:86:dd
SRC=fe80:0000:0000:0000:0280:77ff:fed8:ee7d
DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=485 TC=0 HOPLIMIT=1 FLOWLBL=0
PROTO=UDP SPT=5353 DPT=5353 LEN=445
[ 2192.171020] EXT4-fs (loop0): bad block size 8192
[ 2193.769124] SFW2-INext-DROP-DEFLT IN=eth0 OUT= MAC=
SRC=fe80:0000:0000:0000:02a0:ccff:fed9:b3da
DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=84 TC=0 HOPLIMIT=255 FLOWLBL=0
PROTO=UDP SPT=5353 DPT=5353 LEN=44
[ 2246.621356] EXT4-fs (loop0): bad block size 8192
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next reply other threads:[~2012-09-06 20:34 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-06 20:34 bugzilla-daemon [this message]
2012-09-07 15:32 ` [Bug 47151] provide a file system block size of 8KB for certain SSDs bugzilla-daemon
2012-09-07 18:03 ` bugzilla-daemon
2012-09-07 18:07 ` bugzilla-daemon
2012-09-07 18:12 ` bugzilla-daemon
2012-09-29 12:22 ` bugzilla-daemon
2012-10-01 14:50 ` bugzilla-daemon
2012-10-01 14:56 ` bugzilla-daemon
2012-10-05 17:26 ` bugzilla-daemon
2012-10-05 17:30 ` bugzilla-daemon
2012-10-05 18:07 ` bugzilla-daemon
2012-10-05 18:20 ` bugzilla-daemon
2012-10-10 9:28 ` bugzilla-daemon
2012-10-10 9:36 ` bugzilla-daemon
2012-10-10 9:41 ` bugzilla-daemon
2012-10-10 10:14 ` bugzilla-daemon
2012-10-11 20:54 ` bugzilla-daemon
2012-10-11 20:58 ` bugzilla-daemon
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