常見掛載(mount)設備問題
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Q1. 掛載對象
A1. 硬碟(以分割區為單位), 光碟(cd與dvd), 姆指碟(usb 設備), ...
Q2. 如何得知有什麼設備
A2. 用 指令 dmesg | more 來觀看
例如: 姆指碟
usb 1-1: new full speed USB device using address 3
scsi2 : SCSI emulation for USB Mass Storage devices
Vendor: ASUS Model: Ai-Flash Rev: 2.07
Type: Direct-Access ANSI SCSI revision: 02
SCSI device sdc: 64000 512-byte hdwr sectors (33 MB)
sdc: Write Protect is off
sdc: Mode Sense: 43 00 00 00
sdc: assuming drive cache: write through
sdc: sdc1
例如: DVD-ROM
hdc: ATAPI 48X DVD-ROM drive, 512kB Cache, UDMA(33)
例如: DVD-recorder
hdd: ATAPI 32X DVD-ROM DVD-R CD-R/RW drive, 2000kB Cache, UDMA(33)
Q3. 一台光碟機時可以用 mount /media/cdrom 掛載, 那2台光碟機如何掛載
A3. 假設用 dmesg 看到下2台光碟機
hdc: ATAPI 48X DVD-ROM drive, 512kB Cache, UDMA(33)
hdd: ATAPI 32X DVD-ROM DVD-R CD-R/RW drive, 2000kB Cache, UDMA(33)
[root@p214 media]# mount /dev/hdc cdrom
mount: block device /dev/hdc is write-protected, mounting read-only
[root@p214 media]#mount /dev/hdd cdrecorder
mount: block device /dev/hdd is write-protected, mounting read-only
Q4. 如何得知目前設備的掛載狀況
A4.
[root@p214 media]# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda4 8135576 3428440 4293864 45% /
none 128088 0 128088 0% /dev/shm
/dev/hdc 2408604 2408604 0 100% /media/cdrom
/dev/hdd 269862 269862 0 100% /media/cdrecorder
Q5. 光碟機要換片, 也要做卸載再掛載嗎?
A5. 是的, 沒有做卸載, 光碟片是無法彈出來的, 這是多人多工作業系統的一種措失(防止有他人在用光碟,而你把它換片了)
Q6. 姆指碟如何掛載
A6. 假設用 dmesg 看到下2個姆指碟(注意:本例從sdb開始排起是因為,有一台scsi硬碟用sda這個代號)
usb 1-2: new full speed USB device using address 2
Initializing USB Mass Storage driver...
scsi1 : SCSI emulation for USB Mass Storage devices
Vendor: Model: USB DISK Rev: 2.08
Type: Direct-Access ANSI SCSI revision: 02
SCSI device sdb: 253952 512-byte hdwr sectors (130 MB)
sdb: Write Protect is off
sdb: Mode Sense: 43 00 00 00
sdb: assuming drive cache: write through
sdb: sdb1
Attached scsi removable disk sdb at scsi1, channel 0, id 0, lun 0
USB Mass Storage device found at 2
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
usb 1-1: new full speed USB device using address 3
scsi2 : SCSI emulation for USB Mass Storage devices
Vendor: ASUS Model: Ai-Flash Rev: 2.07
Type: Direct-Access ANSI SCSI revision: 02
SCSI device sdc: 64000 512-byte hdwr sectors (33 MB)
sdc: Write Protect is off
sdc: Mode Sense: 43 00 00 00
sdc: assuming drive cache: write through
sdc: sdc1
Attached scsi removable disk sdc at scsi2, channel 0, id 0, lun 0
USB Mass Storage device found at 3
usb 1-1: control timeout on ep0in
[root@busnet1 media]# mount /dev/sdb1 /media/usb1
[root@busnet1 media]# mount /dev/sdc1 /media/usb2
[root@busnet1 media]# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda1 16126420 3546356 11760752 24% /
none 128092 0 128092 0% /dev/shm
/dev/sda3 996148 17652 927892 2% /home1
/dev/sdb1 126440 32476 93964 26% /media/usb1
/dev/sdc1 31646 20340 11306 65% /media/usb2
from: http://poterp.iem.mit.edu.tw/linux/mount.htm
A1. 硬碟(以分割區為單位), 光碟(cd與dvd), 姆指碟(usb 設備), ...
Q2. 如何得知有什麼設備
A2. 用 指令 dmesg | more 來觀看
例如: 姆指碟
usb 1-1: new full speed USB device using address 3
scsi2 : SCSI emulation for USB Mass Storage devices
Vendor: ASUS Model: Ai-Flash Rev: 2.07
Type: Direct-Access ANSI SCSI revision: 02
SCSI device sdc: 64000 512-byte hdwr sectors (33 MB)
sdc: Write Protect is off
sdc: Mode Sense: 43 00 00 00
sdc: assuming drive cache: write through
sdc: sdc1
例如: DVD-ROM
hdc: ATAPI 48X DVD-ROM drive, 512kB Cache, UDMA(33)
例如: DVD-recorder
hdd: ATAPI 32X DVD-ROM DVD-R CD-R/RW drive, 2000kB Cache, UDMA(33)
Q3. 一台光碟機時可以用 mount /media/cdrom 掛載, 那2台光碟機如何掛載
A3. 假設用 dmesg 看到下2台光碟機
hdc: ATAPI 48X DVD-ROM drive, 512kB Cache, UDMA(33)
hdd: ATAPI 32X DVD-ROM DVD-R CD-R/RW drive, 2000kB Cache, UDMA(33)
[root@p214 media]# mount /dev/hdc cdrom
mount: block device /dev/hdc is write-protected, mounting read-only
[root@p214 media]#mount /dev/hdd cdrecorder
mount: block device /dev/hdd is write-protected, mounting read-only
Q4. 如何得知目前設備的掛載狀況
A4.
[root@p214 media]# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda4 8135576 3428440 4293864 45% /
none 128088 0 128088 0% /dev/shm
/dev/hdc 2408604 2408604 0 100% /media/cdrom
/dev/hdd 269862 269862 0 100% /media/cdrecorder
Q5. 光碟機要換片, 也要做卸載再掛載嗎?
A5. 是的, 沒有做卸載, 光碟片是無法彈出來的, 這是多人多工作業系統的一種措失(防止有他人在用光碟,而你把它換片了)
Q6. 姆指碟如何掛載
A6. 假設用 dmesg 看到下2個姆指碟(注意:本例從sdb開始排起是因為,有一台scsi硬碟用sda這個代號)
usb 1-2: new full speed USB device using address 2
Initializing USB Mass Storage driver...
scsi1 : SCSI emulation for USB Mass Storage devices
Vendor: Model: USB DISK Rev: 2.08
Type: Direct-Access ANSI SCSI revision: 02
SCSI device sdb: 253952 512-byte hdwr sectors (130 MB)
sdb: Write Protect is off
sdb: Mode Sense: 43 00 00 00
sdb: assuming drive cache: write through
sdb: sdb1
Attached scsi removable disk sdb at scsi1, channel 0, id 0, lun 0
USB Mass Storage device found at 2
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
usb 1-1: new full speed USB device using address 3
scsi2 : SCSI emulation for USB Mass Storage devices
Vendor: ASUS Model: Ai-Flash Rev: 2.07
Type: Direct-Access ANSI SCSI revision: 02
SCSI device sdc: 64000 512-byte hdwr sectors (33 MB)
sdc: Write Protect is off
sdc: Mode Sense: 43 00 00 00
sdc: assuming drive cache: write through
sdc: sdc1
Attached scsi removable disk sdc at scsi2, channel 0, id 0, lun 0
USB Mass Storage device found at 3
usb 1-1: control timeout on ep0in
[root@busnet1 media]# mount /dev/sdb1 /media/usb1
[root@busnet1 media]# mount /dev/sdc1 /media/usb2
[root@busnet1 media]# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda1 16126420 3546356 11760752 24% /
none 128092 0 128092 0% /dev/shm
/dev/sda3 996148 17652 927892 2% /home1
/dev/sdb1 126440 32476 93964 26% /media/usb1
/dev/sdc1 31646 20340 11306 65% /media/usb2
from: http://poterp.iem.mit.edu.tw/linux/mount.htm
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