US Robotics 7931 Betriebsanweisung PDF herunterladen (Seite 70)

46 Sun StorageTek SAM Archive Configuration and Administration Guide • Version 4, Update 6, 04/07

Data Verification

If required, you can enable data verification for archive copies. This feature checks

for data corruption on any data that is copied to secondary and/or tertiary media.

The data verification process performs a read-after-write verification test, and

records a confirmation of data validity in the metadata properties for that file.

An ssum option is used to mark files and directories as needing to be verified. Child

directories inherit the data verification properties of their parent. The normal

checksum method is employed to verify copies written to tape or disk archive.

Use the ssum -e command to set data verification for a file or directory. This forces

the generation and use of checksums for archiving and staging, and prevents the

release of the file until all archive copies have been created and their checksums

verified. Only a superuser can set this attribute on a file or directory.

samfs1

File system name.

118.51

Inode number and generation number. The generation number is

used in addition to the inode number for uniqueness since inode

numbers are reused.

162514

Length of the file if the file is written on only one volume. Length

of the section if the file is written on multiple volumes.

t0/fdn

Path and name of the file relative to the file system’s mount

point.

12 f Type of file, as follows:

• d for directory.

• f for regular file.

• l for symbolic link.

• R for removable media file.

• I for segment index.

• S for data segment.

13 0 Section of an overflowed file or segment. If the file is an

overflowed file, the value is nonzero. For all other file types, the

value is 0.

14 56 Equipment ordinal of the drive on which the file was archived.

TABLE 3-1 Archiver Log File Fields (Continued)

Field Example Value Content

1 2 ... 65 66 67 68 69 70 71 72 73 74 75 ... 287 288

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US Robotics 7931 Betriebsanweisung Seite 70