Western Digital Purple PR1000M, Technical Reference Manual

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P
RODUCT
F
EATURES PR1000M
24 RELEASED 5/8/17 (WD CONFIDENTIAL) 2679-800020-A03
3.24 Self-Monitoring, Analysis, and Reporting Technology
(S.M.A.R.T.)
S.M.A.R.T. helps you monitor a drive’s internal status through diagnostic commands at
the host level.
The drive monitors Read Error Rate, Start/Stop Count, Re-allocated Sector Count,
Seek Error Rate, Power-on Hours Count, Spin-up Retry Count, Drive Calibration Retry
Count, Drive Power Cycle Count, Offline Scan Uncorrectable Sector Count, Ultra ATA
CRC Error Rate, Multi-zone Error Rate, Spin-up Time, Relocation Event Count, and
Current Pending Sector Count. The hard drive updates and stores these attributes in
the reserved area of the disk. The drive also stores a set of attribute thresholds that
correspond to the calculated attribute values. Each attribute threshold indicates the
point at which its corresponding attribute value achieves a negative reliability status.
3.25
S
ECURITY
M
ODE
The Security Mode feature set allows the user to create a device lock password that
prevents unauthorized hard drive access even if the drive is removed from the
computer. This feature varies by drive configuration and may not be available on all
configurations.
3.25.1 Master and User Passwords
The manufacturer/dealer can set a master password using the Security Set Password
command, without enabling the device lock function. The user password should be
given or changed by a system user.
Master Password Identifier is supported and set to a default value of 00FE. If a Master
Password is set via a Security Set Password Command, a valid Master Password
Revision code value of 0001h – FFFEh must be used. A Master Password Identifier of
0000h is ignored.
When the master password is set, the drive does not enable the device lock function.
When the user password is set, the drive enables the device lock function, and the
drive is locked after the next power on reset or hard reset.
3.25.2 Security Levels
High - If High level security is set and the user password is forgotten, the master
password can be used to unlock the drive and access the data.
Maximum - If Maximum level security is set and the user password is forgotten, data
access is impossible. Only the master password with a Security Erase Unit command
can unlock the drive when the device lock function is enabled and the user password
has been forgotten. When the Security Erase Unit command is used to unlock the
drive, all user data is erased.