When you need to back up and restore complete file systems, use the ufsdump and ufsrestore commands described in Chapter 50, UFS Backup and Restore Commands (Reference). When you want to copy or move individual files, portions of file systems, or complete file systems, you can use the procedures described in this chapter instead of the ufsdump and ufsrestore commands.
The following table describes when to use the various backup commands.
Table 51–1 When to Use Various Backup Commands
Task |
Command |
For More Information |
---|---|---|
Back up file systems to tape |
ufsdump | |
Create a file system snapshot |
fssnap | |
Restore file systems from tape |
ufsrestore | |
Transport files to other systems |
pax, tar, or cpio | |
Copy files or file systems between disks |
dd | |
Copy files to diskette |
tar |
The following table describes various backup and restore commands.
Table 51–2 Summary of Various Backup Commands
Command Name |
Aware of File System Boundaries? |
Supports Multiple Volume Backups? |
Physical or Logical Copy? |
---|---|---|---|
volcopy |
Yes |
Yes |
Physical |
tar |
No |
No |
Logical |
cpio |
No |
Yes |
Logical |
pax |
Yes |
Yes |
Logical |
dd |
Yes |
No |
Physical |
ufsdump/ufsrestore |
Yes |
Yes |
Logical |
The following sections describe the advantages and disadvantages of each command. Also provided are step-by-step instructions and examples of how to use the commands.