User manual

SANtools® S.M.A.R.T. Disk Monitor (SMARTMon-UX)80

0000: 9C 0A 8D 0F FF FF FF FF FF FF FF FF ............

Page 1Ch Default:

0000: 9C 0A 00 00 00 00 00 00 00 00 00 01 ............

Page 1Ch Saved:

0000: 9C 0A 08 00 00 00 00 00 00 00 00 01 ............

Terminating program.

If you then wanted to make a change to the saved page 1C, you might enter something like

/etc/smartmon-ux -B S,9C,0A,08,00,00,00,00,00,FF,FF,FF,FF /hw/scsi/sc0d1l0

Current, Saved, Default and Changeable Pages refer to the Page Control bits, which determine which set of values

are desired. Basically consider the default settings are factory settings, and saved settings are the result of any

changes that have been "saved" through SMARTMon-UX, or any other program which made a change to a particular

mode page. If you make a change and specify it should be made to the saved page, that change will also be

reflected into the current page.

Not all bits on all mode pages are changeable. Also, is it quite common for firmware upgrades to change changeable

or default bits in particular mode pages. Furthermore, you might not be able to make any changes to a particular

mode page for a particular device.

This manual does not contain the record layout and meanings of mode pages. This information is typically available

from your disk manufacturer's web site, as a good portion of the pages are drive-specific.

Note also that mode pages are not unique to disk drives. They are unique, however to SCSI & Fibre channel devices.

Tapes, CDROMs, disks, and some SES enclosures have mode pages.

If you have multiple mode pages to change, or want to clone some or all mode pages to more than one peripheral of

the same type, you should use the -mpimport and -mpexport functions found in the Batch Mode Page

Import/Export section.

1.26 Mode Page Viewer

The viewer, invoked by the -J option, displays most of the ANSI-defined mode pages in human readable format. The

ANSI specification defines hundreds of mode page settings. Some fields are optional, and some are required

depending on what type of device you have, and what ANSI specification level it is.

The -A option will instruct the software to report full hex dumps of all mode pages ,

You can download one of the ANSI specification at: ftp://ftp.t10.org/t10/drafts/spc3/spc3r05.pdf. It has full information

about interpreting the hundreds of bytes, bits, and bit fields found in SCSI peripherals. In the interest of enticing you to

download the spec, we will discuss a small subset of the information we are learning about one of the Seagate disk

drives attached to a development system. Revisions are constantly changing, and the link will expire some time in the

future. If you just go to the http://www.t10.org site, then you will be able to view all of the documents.

Below are some sample outputs from a disk drive and a tape drive.

Discovered SEAGATE ST373307LC S/N "3HZ0381E" on /dev/sda (SMART enabled)(70007 MB)

Read-Write Error Recovery : Page [01h] (Factory, Current, Saved)

Automatic reallocation of write (AWRE) : 1, 1, 1

Automatic reallocation of read (ARRE) : 1, 1, 1

Transfer block (TB) : 0, 0, 0

Read continuous (RC) : 0, 0, 0

Post error (PER) : 0, 0, 0

Disable transfer on error (DTE) : 0, 0, 0

Disable correction (DCR) : 0, 0, 0

98 95