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
--
Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=bug-47151-13602@https.bugzilla.kernel.org/ \
--to=bugzilla-daemon@bugzilla.kernel.org \
--cc=linux-ext4@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.