Reliability; Annualized Failure Rate (Afr) And Mean Time Between Failures (Mtbf); Reliability Specifications - Seagate ST120HM001 Product Manual

2.10 R
ELIABILITY

2.10.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)

The product shall achieve an Annualized Failure Rate - AFR - of 0.58%. AFR and MTBF are population statistics that are not
relevant to individual units.
AFR and MTBF specifications are based on the following assumptions:
• 8760 power-on-hours per year.
• 250 average power cycles per year.
• Operations at nominal voltages.
• Systems will provide adequate cooling to ensure the case temperatures do not exceed specification.

2.10.2 Reliability specifications

Unrecoverable read error rate during
Annualized Failure Rate (AFR)
Power cycles
Warranty
Preventive maintenance
Typical Data Retention with Power removed (at 40°C)
Endurance
[1] As NAND Flash devices age with use, the capability of the media to retain a programmed value begins to
deteriorate. This deterioration is affected by the number of times a particular memory cell is programmed
and subsequently erased. When a device is new, it has a powered off data retention capability of up to ten
years. With use the retention capability of the device is reduced. Temperature also has an effect on how long
a Flash component can retain its programmed value with power removed. At high temperature the retention
capabilities of the device are reduced. Data retention is not an issue with power applied to the SSD. The
SSD drive contains firmware and hardware features that can monitor and refresh memory cells when power
is applied.
[2] Usage Based Warranty: This warranty is based on the shorter of term and endurance usage of the drive:
36 months or 76 (max capacity) TBW whichever comes first.
S 600 SSD P
EAGATE RODUCT
1 LBA per 10
0.58%
25,000 cycles
(at nominal voltage and temperature, with 60 cycles per hour
and a 50% duty cycle)
Warranty terms are "Usage Based"
sales representative for warranty terms and conditions.
None required.
12 months
Method 1: 40GBs (max capacity) host writes per day
M , R . A
ANUAL EV
16
bits read, max
[2]
Consult your Seagate
[1]
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