Seagate ST9900705SS Savvio 10K.4 SAS Product Manual - Page 47

Savvio 10K.4 SAS Product Manual, Rev. C

39

7.2.2

Locking SP

The Locking SP controls read/write access to the media and the cryptographic erase feature. Access to the

Locking SP is available using the BandMasterX or EraseMaster passwords. Since the drive owner can define

up to 16 data bands on the drive, each data band has its own password called BandMasterX where X is the

number of the data band (0 through 15).

7.2.3

Default password

When the drive is shipped from the factory, all passwords are set to the value of MSID. This 32-byte random

value is printed on the drive label and it can be read by the host electronically over the I/O. After receipt of the

drive, it is the responsibility of the owner to use the default MSID password as the authority to change all other

passwords to unique owner-specified values.

7.3

Random number generator (RNG)

The drive has a 32-byte hardware RNG that it is uses to derive encryption keys or, if requested to do so, to pro-

vide random numbers to the host for system use, including using these numbers as Authentication Keys (pass-

words) for the drive’s Admin and Locking SPs.

7.4

Drive locking

In addition to changing the passwords, as described in Section 7.2.3, the owner should also set the data

access controls for the individual bands.

The variable "LockOnReset" should be set to "PowerCycle" to ensure that the data bands will be locked if

power is lost. This scenario occurs if the drive is removed from its cabinet. The drive will not honor any data

read or write requests until the bands have been unlocked. This prevents the user data from being accessed

without the appropriate credentials when the drive has been removed from its cabinet and installed in another

system.

When the drive is shipped from the factory, the firmware download port is locked and the drive will reject any

attempt to download new firmware. The drive owner must use the SID credential to unlock the firmware down-

load port before firmware updates will be accepted.

7.5

Data bands

When shipped from the factory, the drive is configured with a single data band called Band 0 (also known as

the Global Data Band) which comprises LBA 0 through LBA max. The host may allocate Band1 by specifying a

start LBA and an LBA range. The real estate for this band is taken from the Global Band. An additional 14 Data

Bands may be defined in a similar way (Band2 through Band15) but before these bands can be allocated LBA

space, they must first be individually enabled using the EraseMaster password.

Data bands cannot overlap but they can be sequential with one band ending at LBA (x) and the next beginning

at LBA (x+1).

Each data band has its own drive-generated encryption key and its own user-supplied password. The host may

change the Encryption Key (see Section 7.6) or the password when required. The bands should be aligned to

4K LBA boundaries.

Section	Page
1.0 Scope	9
2.0 Applicable standards and reference documentation	10
2.1 Standards	10
2.1.1 Electromagnetic compatibility	10
2.1.1.1 Electromagnetic susceptibility	10
2.1.2 Electromagnetic compliance	11
2.1.3 European Union Restriction of Hazardous Substances (RoHS)	12
2.2 Reference documents	12
3.0 General description	13
3.1 Standard features	14
3.2 Media description	14
3.3 Performance	15
3.4 Reliability	15
3.5 Formatted capacities	15
3.6 Programmable drive capacity	15
3.7 Factory-installed options	16
4.0 Performance characteristics	17
4.1 Internal drive characteristics	17
4.2 Seek performance characteristics	17
4.2.1 Access time	17
4.2.2 Format command execution time for 512-byte sectors (minutes)	18
4.2.3 General performance characteristics	18
4.3 Start/stop time	18
4.4 Prefetch/multi-segmented cache control	19
4.5 Cache operation	19
4.5.1 Caching write data	19
4.5.2 Prefetch operation	20
5.0 Reliability specifications	21
5.1 Error rates	21
5.1.1 Recoverable Errors	21
5.1.2 Unrecoverable Errors	21
5.1.3 Seek errors	22
5.1.4 Interface errors	22
5.2 Reliability and service	22
5.2.1 Annualized Failure Rate (AFR) and Mean Time Between Failure (MTBF)	22
5.2.2 Preventive maintenance	22
5.2.3 Hot plugging the drive	22
5.2.4 S.M.A.R.T.	23
5.2.5 Thermal monitor	24
5.2.6 Drive Self Test (DST)	25
5.2.6.1 DST failure definition	25
5.2.6.2 Implementation	25
5.2.7 Product warranty	27
6.0 Physical/electrical specifications	28
6.1 PowerChoiceTM power management	28
6.1.1 PowerChoice reporting methods	29
6.2 AC power requirements	29
6.3 DC power requirements	29
6.3.1 Conducted noise immunity	33
6.3.2 Power sequencing	33
6.3.3 Current profiles	34
6.4 Power dissipation	36
6.5 Environmental limits	39
6.5.1 Temperature	39
6.5.2 Relative humidity	40
6.5.3 Effective altitude (sea level)	40
6.5.4 Shock and vibration	40
6.5.4.1 Shock	41
6.5.4.2 Vibration	43
6.5.5 Air cleanliness	43
6.5.6 Corrosive environment	43
6.5.7 Acoustics	44
6.5.8 Electromagnetic susceptibility	44
6.6 Mechanical specifications	45
7.0 About self-encrypting drives	46
7.1 Data encryption	46
7.2 Controlled access	46
7.2.1 Admin SP	46
7.2.2 Locking SP	47
7.2.3 Default password	47
7.3 Random number generator (RNG)	47
7.4 Drive locking	47
7.5 Data bands	47
7.6 Cryptographic erase	48
7.7 Authenticated firmware download	48
7.8 Power requirements	48
7.9 Supported commands	48
8.0 Defect and error management	49
8.1 Drive internal defects/errors	49
8.2 Drive error recovery procedures	49
8.3 SAS system errors	50
8.4 Background Media Scan	51
8.5 Media Pre-Scan	51
8.6 Deferred Auto-Reallocation	51
8.7 Idle Read After Write	52
8.8 Protection Information (PI)	52
8.8.1 Levels of PI	52
8.8.2 Setting and determining the current Type Level	52
8.8.3 Identifying a Protection Information drive	53
9.0 Installation	54
9.1 Drive orientation	54
9.2 Cooling	55
9.3 Drive mounting	56
9.4 Grounding	56
10.0 Interface requirements	57
10.1 SAS features	57
10.1.1 task management functions	57
10.1.2 task management responses	57
10.2 Dual port support	58
10.3 SCSI commands supported	59
10.3.1 Inquiry data	63
10.3.2 Mode Sense data	63
10.4 Miscellaneous operating features and conditions	67
10.4.1 SAS physical interface	68
10.4.2 Physical characteristics	71
10.4.3 Connector requirements	71
10.4.4 Electrical description	71
10.4.5 Pin descriptions	71
10.4.6 SAS transmitters and receivers	72
10.4.7 Power	72
10.5 Signal characteristics	72
10.5.1 Ready LED Out	72
10.5.2 Differential signals	73
10.6 SAS-2 Specification compliance	73
10.7 Additional information	73
11.0 Seagate Technology support services	74
Numerics	77
A	77
B	77
C	77
D	77
E	78
F	78
G	78
H	78
I	78
J	78
K	78
L	78
M	79
N	79
O	79
P	79
Q	79
R	80
S	80
T	80
U	81
V	81
W	81

Seagate ST9900705SS Savvio 10K.4 SAS Product Manual - Page 47

Random number generator RNG, Drive locking, Data bands

Page 47 highlights