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ANNOUNCING FDRERASE ERASING DISK VOLUMES

FDRERASE is the first z/OS secure erase utility to earn International CCEVS EAL2+ validation

• At the end of a disaster test, or when leaving the site after a real disaster
• When you are disconnecting a disk control unit, after moving all data with FDRPAS or some other means
• When reusing disk volumes for new purposes, to be sure that no residual data remains
• FDRERASE meets these needs. It can quickly erase many disk volumes in parallel, allowing you to erase your data from a set of disks in the minimum elapsed time.

• The ERASE function of FDRERASE will overwrite every track with a single track-length record consisting of binary zeroes. This will make all data originally on each track unrecoverable by any normal means (through the disk control unit). This is sufficient for most purposes.
• Optionally you can specify a pattern of data for the record, a single hex byte which is replicated throughout the track-length record.
• Optionally you can cause the erase record to be written on each track multiple times, and can vary the pattern in each “pass”.
• The SECUREERASE function will default to 3 passes on each track, writing a random pattern, a complement of the first pattern, and finally another random pattern. This makes the original data unrecoverable even if the hard drives are removed from the control unit and may be used for sensitive data when the disks will be sold or scrapped.
• The QUICKERASE function will use hardware ERASE commands to erase all records from each track in a minimum amount of time. QUICKERASE is usually sufficient to eradicate corporate data when the disks will be reused, such as at a disaster site.
• The SIMERASE function will not erase any disks, but will validate your control statements and identify the disks that will be erased.

You can run a considerable number of concurrent erase functions with little increase in time-per-disk, but your elapsed time will vary depending on the type of subsystem and type of channels. FDRERASE can erase up to 64 disks concurrently in a single step, and up to 8190 volumes total per step.

The SECUREERASE and other non-default operations may take longer since FDRERASE must send more data down the channel for each track.

FDRERASE operates only on offline disks. You specify device address, or an address prefix (such as 1A* to do devices 1A00-1AFF); FDRERASE will identify the offline disk devices and erase only those volumes. For FDRPAS customers, FDRERASE will erase only FDRPAS source volumes (previously online), but it can be told to erase any offline disk.

Here is a sample FDRERASE jobstream:

 //ERASE EXEC PGM=FDRERASE,REGION=0M
 //SYSPRINT DD SYSOUT=*
 //SYSIN DD *
    ERASE TYPE=FULL,MAXTASKS=20
    MOUNT ERASEUNIT=(1A*,1B*)

After an ERASE, the printout shows the erase record on the track; the original data is gone: