Tektronix MSO70000 Series Instructions Manual page 18

Clear and Sanitize Procedures
Clearing Hard Disk/Solid
State Disk Drives
10
NOTE. The following procedure covers only Tektronix installed software.
If your organization's security protocols allow the use of software to purge or clear
hard drives/solid state drives, you can use commercial software to erase free space
on the drive before sending the instrument out for upgrades or repair. Follow the
instructions that come with the software to be sure that the erasure of sensitive
data from the drive complies with your organization's security protocols.
On solid state drives, the drive and the operating system work together to
reallocate sectors on the drive to even out the wear of the storage cells. Make
sure that software you use to purge or clear a solid state drive is approved for
solid state drives.
CAUTION.
Before clearing the drive to meet security requirements, be sure that an
OS-restore disk and product software restore disk are available and that you have
the procedures needed to restore the OS and product software. On MSO5000/B
and DPO5000/B Series instruments, if you delete files that are required by the
operating system or the instrument software, you must install a new drive that has
the OS and instrument software already installed.
Sequence for clearing secure data from a drive:
1. Erase all files with the following extensions:
*.png; *.bmp;*.pcx, *.tif, *.jpg – These file types can be screenshots that
can contain valuable information.
*.msk, *.set, *.wfm, *.csv, *.txt, *.dat – These file types can contain data
exported from the instrument (setup, waveforms, measurement results).
2. Acquire several full memory-length acquisitions of noise (no signal attached
to the input).
3. Close the TekScope application and erase the free space on the hard disk
using commercial software.
Declassification and Security