大...@元記事です。
From: Hirohito <m...@youko-house.ne.jp>
Message-ID: <4b717ed8.4060...@youko-house.ne.jp>
> 私は、ATA/SATA to USB アダプタを、４種類ほど使った経験がありますが、
> 挙動や安定性にばらつきがあるように感じます。
>
> アダプタを買い換えてみるか、もしくはアダプタを使わずにディスクを接続して
> 試してみてはいかがでしょうか。
設置環境上ケースを開けるのが面倒だったので避けていたのですが,
御指摘に従ってSATA直結で試してみました。
# fdisk /dev/ad4
******* Working on device /dev/ad4 *******
parameters extracted from in-core disklabel are:
cylinders=1938021 heads=16 sectors/track=63 (1008 blks/cyl)
Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=1938021 heads=16 sectors/track=63 (1008 blks/cyl)
Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 63, size 1953525105 (953869 Meg), flag 80 (active)
beg: cyl 0/ head 1/ sector 1;
end: cyl 612/ head 15/ sector 63
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>
# fdisk -BI /dev/ad4
******* Working on device /dev/ad4 *******
fdisk: Geom not found: "ad4"
# fdisk /dev/ad4
******* Working on device /dev/ad4 *******
parameters extracted from in-core disklabel are:
cylinders=1938021 heads=16 sectors/track=63 (1008 blks/cyl)
Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=1938021 heads=16 sectors/track=63 (1008 blks/cyl)
Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 63, size 1953525105 (953869 Meg), flag 80 (active)
beg: cyl 0/ head 1/ sector 1;
end: cyl 612/ head 15/ sector 63
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>
# cat var/bsdlabel.txt
8 partitions:
# size offset fstype [fsize bsize bps/cpg]
a: 4194304 0 4.2BSD 2048 16384 28528
b: 16777216 4194304 swap
c: 1953525105 0 unused 0 0 # "raw" part, don't
edit
d: 16777216 20971520 4.2BSD 2048 16384 28528
e: 16777216 37748736 4.2BSD 2048 16384 28528
f: 67108864 54525952 4.2BSD 2048 16384 28528
g: 67108864 121634816 4.2BSD 2048 16384 28528
h: 1764781425 188743680 4.2BSD 2048 16384 28528
# bsdlabel -w -B /dev/ad4s1
# bsdlabel -R -B /dev/ad4s1 var/bsdlabel.txt
# bsdlabel /dev/ad4s1
# /dev/ad4s1:
8 partitions:
# size offset fstype [fsize bsize bps/cpg]
a: 4194304 0 4.2BSD 2048 16384 28528
b: 16777216 4194304 swap
c: 1953525105 0 unused 0 0 # "raw" part, don't
edit
d: 16777216 20971520 4.2BSD 2048 16384 28528
e: 16777216 37748736 4.2BSD 2048 16384 28528
f: 67108864 54525952 4.2BSD 2048 16384 28528
g: 67108864 121634816 4.2BSD 2048 16384 28528
h: 1764781425 188743680 4.2BSD 2048 16384 28528
# newfs -U /dev/ad4s1a
/dev/ad4s1a: 2048.0MB (4194304 sectors) block size 16384, fragment size 2048
using 12 cylinder groups of 183.72MB, 11758 blks, 23552 inodes.
with soft updates
super-block backups (for fsck -b #) at:
160, 376416, 752672, 1128928, 1505184, 1881440, 2257696, 2633952, 3010208,
3386464, 3762720, 4138976
# newfs -U /dev/ad4s1d
/dev/ad4s1d: 8192.0MB (16777216 sectors) block size 16384, fragment size 2048
using 45 cylinder groups of 183.72MB, 11758 blks, 23552 inodes.
with soft updates
super-block backups (for fsck -b #) at:
(snip)
# newfs -U /dev/ad4s1e
/dev/ad4s1e: 8192.0MB (16777216 sectors) block size 16384, fragment size 2048
using 45 cylinder groups of 183.72MB, 11758 blks, 23552 inodes.
with soft updates
super-block backups (for fsck -b #) at:
(snip)
# newfs -U /dev/ad4s1f
/dev/ad4s1f: 32768.0MB (67108864 sectors) block size 16384, fragment size 2048
using 179 cylinder groups of 183.72MB, 11758 blks, 23552 inodes.
with soft updates
super-block backups (for fsck -b #) at:
(snip)
# newfs -U /dev/ad4s1g
/dev/ad4s1g: 32768.0MB (67108864 sectors) block size 16384, fragment size 2048
using 179 cylinder groups of 183.72MB, 11758 blks, 23552 inodes.
with soft updates
super-block backups (for fsck -b #) at:
(snip)
# newfs -U /dev/ad4s1h
/dev/ad4s1h: 861709.7MB (1764781424 sectors) block size 16384, fragment size
2048
using 4691 cylinder groups of 183.72MB, 11758 blks, 23552 inodes.
with soft updates
super-block backups (for fsck -b #) at:
(snip)
# mount -t ufs /dev/ad4s1a /mnt
# df
Filesystem 512-blocks Used Avail Capacity Mounted on
/dev/ad0s1a 2025948 1125024 738852 60% /
devfs 2 2 0 100% /dev
/dev/ad0s1h 334638772 288049272 19818400 94% /home
/dev/ad0s1d 8116124 1168632 6298204 16% /tmp
/dev/ad0s1g 48744920 20984600 23860728 47% /usr
/dev/ad0s1e 8116124 6086928 1379908 82% /var
/dev/ad0s1f 64989336 50150076 9640116 84% /var/news
procfs 8 8 0 100% /proc
linprocfs 8 8 0 100% /usr/compat/linux/proc
/dev/ad4s1a 4052060 8 3727888 0% /mnt
# umount /mnt
# mount -t ufs /dev/ad4s1h /mnt
# df
Filesystem 512-blocks Used Avail Capacity Mounted on
/dev/ad0s1a 2025948 1125024 738852 60% /
devfs 2 2 0 100% /dev
/dev/ad0s1h 334638772 288049272 19818400 94% /home
/dev/ad0s1d 8116124 1168632 6298204 16% /tmp
/dev/ad0s1g 48744920 20984600 23860728 47% /usr
/dev/ad0s1e 8116124 6086928 1379908 82% /var
/dev/ad0s1f 64989336 50150076 9640116 84% /var/news
procfs 8 8 0 100% /proc
linprocfs 8 8 0 100% /usr/compat/linux/proc
/dev/ad4s1h 1709239676 8 1572500496 0% /mnt
# umount /mnt
……と, newfsまで正常にできました。
この後, USBで繋ぎ直してみましたが, mount・読み書きとも問題ありません。
# fdisk /dev/da0
******* Working on device /dev/da0 *******
parameters extracted from in-core disklabel are:
cylinders=121601 heads=255 sectors/track=63 (16065 blks/cyl)
Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=121601 heads=255 sectors/track=63 (16065 blks/cyl)
Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 63, size 1953525105 (953869 Meg), flag 80 (active)
beg: cyl 0/ head 1/ sector 1;
end: cyl 612/ head 15/ sector 63
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>
# mount -t ufs /dev/da0s1a /mnt
# df
Filesystem 1K-blocks Used Avail Capacity Mounted on
/dev/ad0s1a 1012974 562512 369426 60% /
devfs 1 1 0 100% /dev
/dev/ad0s1h 167319386 144024064 9909772 94% /home
/dev/ad0s1d 4058062 584330 3149088 16% /tmp
/dev/ad0s1g 24372460 10492310 11930354 47% /usr
/dev/ad0s1e 4058062 3043584 689834 82% /var
/dev/ad0s1f 32494668 25075038 4820058 84% /var/news
procfs 4 4 0 100% /proc
linprocfs 4 4 0 100% /usr/compat/linux/proc
devfs 1 1 0 100% /var/named/dev
/dev/da0s1a 2026030 4 1863944 0% /mnt
# touch /mnt/test
# ls /mnt
.snap test
# rm /mnt/test
# umount /mnt
fdiskで出力されるパラメータ(特にsize)が前回と変わっているのが
気になりますが, ハングアップの原因もこれでしょうか。
(前回:USB)
cylinders=121601 heads=255 sectors/track=63 (16065 blks/cyl)
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 63, size 1953520002 (953867 Meg), flag 80 (active)
beg: cyl 0/ head 1/ sector 1;
end: cyl 768/ head 254/ sector 63
(今回:SATA)
cylinders=1938021 heads=16 sectors/track=63 (1008 blks/cyl)
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 63, size 1953525105 (953869 Meg), flag 80 (active)
beg: cyl 0/ head 1/ sector 1;
end: cyl 612/ head 15/ sector 63
(今回:USB)
cylinders=121601 heads=255 sectors/track=63 (16065 blks/cyl)
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 63, size 1953525105 (953869 Meg), flag 80 (active)
beg: cyl 0/ head 1/ sector 1;
end: cyl 612/ head 15/ sector 63
何れにしても, エラーならともかくハングアップするというのは
勘弁して欲しいところです。
最後に, 御意見を下さった長谷川さん, 植村さん, ひろひとさん,
大変ありがとうございました。
--
大友紘之
oot...@za.wakwak.com
