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Shell Programming and Scripting
Mount/fstab Question . . .
Post 302925654 by Corona688 on Tuesday 18th of November 2014 11:59:34 AM
11-18-2014
Quote:
/dev/ is folder where device files are kept -- the files UNIX/Linux need to access, among other things, disks. You opened your new partition overtop of that, blocking them all. (Kind of like setting a blank sheet of paper atop a written one; the stuff beneath still exists, but you don't see it.) Things already open won't be affected, but you won't be able to open anything else. This has wider effects than disks. You probably lost the ability to create new terminals too, as well as sound, mice, even the bit-bucket, anything which is a character or block device.
You might have been able to recover from that with umount /dev but a reboot is good too.
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cmdk
cmdk(7D) Devices cmdk(7D) NAME
cmdk - common disk driver SYNOPSIS
cmdk@target, lun : [ partition | slice ] DESCRIPTION
The cmdk device driver is a common interface to various disk devices. The driver supports magnetic fixed disks and magnetic removable disks. The block-files access the disk using the system's normal buffering mechanism and are read and written without regard to physical disk records. There is also a "raw" interface that provides for direct transmission between the disk and the user's read or write buffer. A sin- gle read or write call usually results in one I/O operation; raw I/O is therefore considerably more efficient when many bytes are transmit- ted. The names of the block files are found in /dev/dsk; the names of the raw files are found in /dev/rdsk. I/O requests to the magnetic disk must have an offset and transfer length that is a multiple of 512 bytes or the driver returns an EINVAL error. Slice 0 is normally used for the root file system on a disk, slice 1 as a paging area (for example, swap), and slice 2 for backing up the entire fdisk partition for Solaris software. Other slices may be used for usr file systems or system reserved area. Fdisk partition 0 is to access the entire disk and is generally used by the fdisk(1M) program. FILES
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See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Architecture |x86 | +-----------------------------+-----------------------------+ SEE ALSO
fdisk(1M), mount(1M), lseek(2), read(2), write(2), readdir(3C), scsi(4), vfstab(4), attributes(5), dkio(7I) SunOS 5.10 9 Oct 2004 cmdk(7D)