Seagate ST480HM000 ユーザーズマニュアル

S

EAGATE 

600 SSD P

RODUCT 

M

ANUAL

, R

EV

. A

  13

  

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.

Unrecoverable read error rate during

1 LBA per 10

16

 bits read, max

Annualized Failure Rate (AFR)

0.58%

Power cycles

25,000 cycles 
(at nominal voltage and temperature, with 60 cycles per hour 
and a 50% duty cycle)

Warranty

Warranty terms are “Usage Based” 

sales representative for warranty terms and conditions. 

Preventive maintenance

None required.

Typical Data Retention with Power removed (at 40°C)

Endurance

Method 1: 40GBs (max capacity) host writes per day

[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.