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тАО09-18-2008 11:07 PM
тАО09-18-2008 11:07 PM
raw1:sda5
raw2:sda6
raw3:sda7
# raw -qa
/dev/raw/raw1: bound to major 8, minor 5
/dev/raw/raw2: bound to major 8, minor 6
/dev/raw/raw3: bound to major 8, minor 7
# ls -l /dev/raw/
total 0
crw-rw---- 1 root disk 162, 1 Sep 19 13:00 raw1
crw-rw---- 1 root disk 162, 2 Sep 19 13:00 raw2
crw-rw---- 1 root disk 162, 3 Sep 19 13:00 raw3
crw-rw---- 1 root disk 162, 0 Sep 19 13:00 rawctl
# ls -l /dev/sda5
brw-r----- 1 root disk 8, 5 Sep 19 08:16 /dev/sda5
# ls -l /dev/sda6
brw-r----- 1 root disk 8, 6 Sep 19 08:16 /dev/sda6
# ls -l /dev/sda7
brw-r----- 1 root disk 8, 7 Sep 19 08:16 /dev/sda7
now I wana access the raw device
# mount /dev/sda7 /mnt
mount: you must specify the filesystem type
why ? /dev/sda7 is a raw device, why should I make a filesystem on the RAW device(/dev/sda7) ?
I have heard that:
raw device doesnt require filesystem.. thats why these devices provides fast I/O, because there is no filesystem layer b/w application and the device.
Regards
Solved! Go to Solution.
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тАО09-19-2008 03:45 AM
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тАО09-19-2008 07:25 AM
тАО09-19-2008 07:25 AM
Re: how to use raw devices
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тАО09-22-2008 09:21 AM
тАО09-22-2008 09:21 AM
Re: how to use raw devices
Oracle or specific applications have the special considerations to read/write in the raw devices.
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тАО09-22-2008 09:22 AM
тАО09-22-2008 09:22 AM
Re: how to use raw devices
#stat -f /dev/sda7