ADVANCED DISK MANAGEMENT

VIRTUAL FILE SYSTEMS

DiskSuite

Solstice DiskSuite 'metadevice'		/dev/md/rdsk/d01			/dev/md/dsk/d01
DiskSuite GUI:  /usr/sbin/metatool
DiskSuite also has command line interface with most commands starting with 'meta'.

Volume Manager

Solstice Enterprise Volume Mgr 'volume' 	/dev/rdsk/rootdg/vol01		/dev/vx/dsk/rootdg/vol01
(aka Veritas Volume Mgr)
Disk group is a group of VM disks which are sliced into Subdisks  which can be combined to make a Plex  
which are combined to make a  Volume.
Volume Mgr GUI:  vxva
Volume Mgr Menu:  vxdiskadm
Volume Mgr also has command line interface with most commands starting with 'vx'.

Terms

RAID		Redundant Arrays of Inexpensive Disks
Concatenated	a virtual device that combines slices from one or more physical disks that are used 
sequentially.
Striped		a virtual device that combines interleaved slices from one or more physical disks


RAID Levels (brief listing, there are more)

0	concatenated or striped
1	mirror
5	block-interleaved striping with  distributed parity 
10	mirrored striping or striped mirroring  (RAID 1 + 0)


Pseudo File Systems

Type		Info										
procfs		Process file system lists active processes in the /proc directory, sub-directories named by 
process id contain files with info on that process.
tmpfs		Temporary file system for file storage in momory without needing to write to disk,
created & destroyed when system is rebooted.
fdfs		File Descriptor file system provides explicit names for opening files using file descriptors 
in the /dev/fd directory.   
/dev/fd/0	stdin
/dev/fd/1	stdout
/dev/fd/2	stderr
/dev/fd/3	name of file.
swapfs		Swap file system used by the kernel as virtual memory storage when the system doesn't 
have enough physical memory for it's needs.

swap command
	-l	lists the status of swap space
	-a	adds to swap
	-d	deletes from swap
	-s 	list summary of swap space