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тАО06-04-2009 01:54 AM
тАО06-04-2009 01:54 AM
Ex:
mkfs -F vxfs /dev/rdsk/disk1
but we can not
mount -F vxfs /dev/rdsk/disk1
We have to mount block device only
mount -F vxfs /dev/dsk/disk1
Why this so ....?
Solved! Go to Solution.
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тАО06-04-2009 02:09 AM
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тАО06-04-2009 02:15 AM
тАО06-04-2009 02:15 AM
Re: Device Drivers character Device / block device ...?
mount -F vxfs /dev/dsk/disk1 /mnt1
but my query is that why we can not mont raw /character device....?
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тАО06-04-2009 02:20 AM
тАО06-04-2009 02:20 AM
Re: Device Drivers character Device / block device ...?
you are creating filesystem structure on raw devices because it's faster as on the block devices.
check this link :
http://forums11.itrc.hp.com/service/forums/questionanswer.do?admit=109447626+1244110731714+28353475&threadId=878764
mikap
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тАО06-04-2009 02:37 AM
тАО06-04-2009 02:37 AM
Re: Device Drivers character Device / block device ...?
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тАО06-04-2009 05:01 PM
тАО06-04-2009 05:01 PM
Re: Device Drivers character Device / block device ...?
Bill Hassell, sysadmin
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тАО06-06-2009 05:39 AM
тАО06-06-2009 05:39 AM
Re: Device Drivers character Device / block device ...?
raw devices bypass the buffer cache and use DMA directly to/from the program's I/O buffers; they are normally restricted to full-sector transfers. Using raw devices generally will give you faster performance. Raw devices are used when making new filesystems, when checking unmounted filesystems, or for copying quiescent filesystems. The block devices are used to mount filesystems. Each disk has a block device interface where the system makes the device byte addressable and you can write a single byte in the middle of the disk.
thanks and regards
Sajjad Sahir
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тАО06-06-2009 10:51 PM
тАО06-06-2009 10:51 PM
Re: Device Drivers character Device / block device ...?
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тАО08-30-2009 10:30 PM
тАО08-30-2009 10:30 PM
Re: Device Drivers character Device / block device ...?
Thnkx