On 10/23/11 12:23 AM, Ken godee wrote:
> Maybe try to partition it to see what happens.
with parted at least, I'm stuck with a vicious circle that won't let me
align the data right?
# parted /dev/sdc
GNU Parted 2.1
Using /dev/sdc
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel msdos
Warning: The existing disk label on /dev/sdc will be destroyed and all
data on this disk will be lost. Do you want to continue?
Yes/No? y
(parted) mkpart primary ext4 512k -1s
Warning: The resulting partition is not properly aligned for best
performance.
Ignore/Cancel? i
(parted) quit
# mkfs.ext4 /dev/sdc1
mke2fs 1.41.12 (17-May-2010)
/dev/sdc1 alignment is offset by 4096 bytes.
This may result in very poor performance, (re)-partitioning suggested.
Filesystem label=
OS type: Linux
Block size=8192 (log=3)
Fragment size=8192 (log=3)
Stride=1 blocks, Stripe width=0 blocks
12210528 inodes, 24413127 blocks
1220656 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4311218176
373 block groups
65528 blocks per group, 65528 fragments per group
32736 inodes per group
Superblock backups stored on blocks:
65528, 196584, 327640, 458696, 589752, 1638200, 1769256, 3210872,
5307768, 8191000, 15923304, 22476104
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 22 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
# mount -t ext4 /dev/sdc1 /ssd
mount: wrong fs type, bad option, bad superblock on /dev/sdc1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
# tail /var/log/messages
....
Oct 23 00:27:43 svfis-dl180b kernel: EXT4-fs (sdc1): bad block size 8192
GRRR ok. um.
# parted /dev/sdc
GNU Parted 2.1
Using /dev/sdc
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) unit b
(parted) print
Model: HP LOGICAL VOLUME (scsi)
Disk /dev/sdc: 199992852480B
Sector size (logical/physical): 512B/8192B
Partition Table: msdos
Number Start End Size Type File system Flags
1 512000B 199992852479B 199992340480B primary ext4
(parted) rm 1
(parted) mkpart primary ext4 1024s -1s
Warning: The resulting partition is not properly aligned for best
performance.
Ignore/Cancel? y
parted: invalid token: y
Ignore/Cancel? ignore
(parted) print
Model: HP LOGICAL VOLUME (scsi)
Disk /dev/sdc: 199992852480B
Sector size (logical/physical): 512B/8192B
Partition Table: msdos
Number Start End Size Type File system Flags
1 524288B 199992852479B 199992328192B primary
(parted) quit
# mkfs.ext4 /dev/sdc1
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=8192 (log=3)
Fragment size=8192 (log=3)
Stride=1 blocks, Stripe width=0 blocks
12210528 inodes, 24413126 blocks
1220656 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4311218176
373 block groups
65528 blocks per group, 65528 fragments per group
32736 inodes per group
Superblock backups stored on blocks:
65528, 196584, 327640, 458696, 589752, 1638200, 1769256, 3210872,
5307768, 8191000, 15923304, 22476104
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
*and, yup, 8K blocks still won't mount*
so...
# mkfs.ext4 -b 4096 -F /dev/sdc1
mke2fs 1.41.12 (17-May-2010)
Warning: specified blocksize 4096 is less than device physical
sectorsize 8192, forced to continue
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
^^^^^^
...
fixes it. have to use -F to format this thing. now I''m seeing IO
more like what I'd expect to see.
--
john r pierce N 37, W 122
santa cruz ca mid-left coast
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