Release 6.0
249
User Guide
Chapter 8 Installing Optional Parts
Disk Drive Features
The disk drives that can be connected to the disk array unit are:
SSD - Most superior in reliability and random access performance due to having no mechanical
parts (motor, head, media), unlike HDD.
SAS HDD - Superior in reliability and performance. Used in critical tasks requiring high
performance/non-stop function.
Nearline SAS HDD - High capacity disk that is suitable as a back up or archive disk. Can be used
for regular, relatively low burden work (random access I/O) offered at a low price. Because it has
both high capacity and low performance, failure recovery time is longer than that of SAS HDD.
A 3.5-inch NL-SAS 3-TB Disk Drive (NF5321-SM709E) can be used only by NEC Storage Manager
Ver.7.4 or later and NEC Storage basic control software Ver.0740 or later.
A 2.5-inch SAS 900-GB Disk Drive (NF5321-SM769E) can be used by NEC Storage Manager
Ver.7.3 or later and NEC Storage basic control software Ver.073A or later.
In terms of reliability, RAID-60 and RAID-TM, which have duplicate redundancy, are
recommended.
Table 8-4: Disk Drive Features
SSD
15 Krpm SAS
HDD
10 Krpm SAS
HDD
7.2 Krpm Nearline
SAS HDD
Reliability
Optimal
High
High
Low
Performance
Optimal
High
Average
Low
Higher random
access
performance than
SATA
Purpose
High random
access
performance
High
reliability
Low noise
Mission-critical
High
transaction
Low power
consumption
High capacity
Backup/archive
Regular,
low-burden work
(random access
I/O)
Содержание M100
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