US Robotics 7931 Betriebsanweisung PDF herunterladen (Seite 244)

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

5. Use the samd(1M) config command to propagate the defaults.conf file

changes.

Using Removable Media Files

You can use the request(1) command to manually create, write, and read files that

do not use the disk cache for buffering the data. Files created in this manner are

called removable media files.

Note – The request(1) command bypasses the typical functions of the archiver.

Removable media files look like typical Sun StorageTek SAM files in that they have

permissions, a user name, a group name, and size characteristics. However, their

data does not reside in the disk cache. Thus, you can create removable media files

that are larger than the disk cache and write them to removable media cartridges.

The system creates an inode entry in the .inodes file for the file that you specify on

the request(1) command. The Sun StorageTek SAM file systems read that

information from the inode entry. Multiple removable media files can reside on the

same volume.

If a removable media file spans multiple volumes, it is called a volume overflow file.

The volume overflow feature enables a single large file to span multiple volumes on

multiple cartridges. The volume overflow feature is useful if you have very large

files that exceed the capacity of their chosen media.

You must read and write removable media files sequentially. The Sun StorageTek

SAM file system automatically mounts the requested volume if the volume resides

in an automated library defined in the mcf file.

The presence of a removable media file on a volume prevents that volume from

being recycled. The recycler expects that only archived files reside on the particular

volume that is assigned for archiving. In addition, removable media files are never

archived. Removable media files are not supported over NFS.

# samd config

1 2 ... 239 240 241 242 243 244 245 246 247 248 249 ... 287 288

Keine Kommentare

US Robotics 7931 Betriebsanweisung Seite 244