Technical Advisory 964-1

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request will be decrypted using the band 1 key. This means that any data written to disk while Band 0 owned
the LBA range is now unreadable. Subsequent securing/un-securing of the SED will always operate within band
1 . So, any data written to disk while blocks were owned by band 0 is no longer readable after LBA range is
transferred to band 1. The data is not overwritten when the band ownership changed, but there is no way for
the user to change the band association back to band 0 at this time.
Corrective Action / Resolution
Update to Firmware package version 12.9.0-xxxx. which can be found on the Intel.com web site. This build of the
MegaRAID firmware version will not modify band sizes when enabling disk security, but will secure band0 (full drive size)
and band 1 (at 0 LBA). On drive re-provisioning (secure erase) the FW will attempt to enable band1 to the full LBA range.
If this call to the drive fails, the drive will be marked as “unsupported”. The inability to make band1 the entire range of
LBAs on the drive is an indicator that there are additional bands on the drive and this drive may be open for incident.
Again, by enabling Drive Encryption prior to installation of an Operating System, partition creation or Data Storage usage
will eliminate this potential data concern.
Please contact your Intel Sales Representative if you require more specific information about this issue.
Enterprise Platforms & Services Division
Intel Corporation