SYSTEM CONFIGRATION GUIDE
–
NEC Express5800/T110h
NEC Corporation
Revision 5.0
– January, 2017
35
Endurance of SSD
The 2.5-inch SAS/SATA SSDs have limited lifetime, which can only be written a limited number of times before it fails.
The warranty period of SSD is the stated period of warranty or until the total bytes of written value (PBW) exceeds the
limit value, whichever occurs first. It is recommended to check the total bytes of written value periodically.
Refer to the table below for the write endurance (PBW and DWPD), warranty period and monitoring tool.
SSD Lifetime
Part Number
Product Name
PBW
DWPD
Period
Monitoring Tool
SAS SSD
Universal RAID Utility,
EXPRESSBUILDER
(System Test and
Diagnostics)
N8150-721
200GB Hot Plug
2.5-inch SAS SSD
3.6PBW
10 Times
3 Years
N8150-722
400GB Hot Plug
2.5-inch SAS SSD
7.3PBW
10 Times
3 Years
SATA SSD (Middle Endurance)
N8150-725
200GB Hot Plug
2.5-inch SATA SSD
3.6PBW
10 Times
3 Years
N8150-726
400GB Hot Plug
2.5-inch SATA SSD
7.3PBW
10 Times
3 Years
N8150-727
800GB Hot Plug
2.5-inch SATA SSD
14.6PBW
10 Times
3 Years
SATA SSD (Low Endurance)
N8150-732
200GB Hot Plug
2.5-inch SATA SSD
1.1PBW
3 Times
3 Years
N8150-733
400GB Hot Plug
2.5-inch SATA SSD
3.0PBW
3 Times
3 Years
N8150-734
800GB Hot Plug
2.5-inch SATA SSD
5.3PBW
3 Times
3 Years
N8150-735
1.6TB Hot Plug
2.5-inch SATA SSD
10.7PBW
3 Times
3 Years
PBW(Peta-Bytes Write): Total amount of data that can be written into the SSD. 1PB=1,000TB.
DWPD(Drive Writes per Day): Rewrite capacity of the SSD per day.
Check the lifetime of SSD by monitoring tool regularly.
It is recommended to replace the SSD before it reaches its end of life. For repurchase, please contact your sales representative.
For detailed operating methods of monitoring tool, refer to the User
’s Guide.
