User guide

Chapter 1 Overview
> 1.2 Configuration
ETERNUS DX60/DX80/DX90 Disk storage system User Guide
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Copyright 2010 FUJITSU LIMITED
P3AM-3042-06ENZ0
• Table 1.5
shows the maximum number of volumes that can be set.
Table 1.5 The maximum number of volumes that can be set
• Table 1.6
shows the time for volume formatting (when the volume capacity is 100GB).
Table 1.6 Volume formatting time (for SAS disks and Nearline SAS disks)
*1: The value shows the time required for volume formatting when the volume capacity is 100GB and
there is no server I/O. The time depends on the disk configuration or the disk type.
• No more than 8TB can be used for any one volume. However, the maximum allowed volume
capacity is OS dependent.
1.2.3 System Disks
System disks are disks which have part of their area assigned for use by the system (the system
area), and two system disks are installed in Slot0 and Slot1 in the controller enclosure.
Model Per RAID group Per storage system
ETERNUS DX60 Max. 128 Max. 512
ETERNUS DX80/DX90 Max. 128 Max. 1,024
RAID
level
No. of
disks
Time required for volume formatting (*1)
3.5" SAS disks 2.5" SAS disks Nearline SAS disks
RAID1 2 Approx. 35 minutes/100GB Approx. 40 minutes/100GB Approx. 73 minutes/100GB
RAID1+0 8 Approx. 25 minutes/100GB Approx. 30 minutes/100GB Approx. 43 minutes/100GB
RAID5 5 Approx. 25 minutes/100GB Approx. 25 minutes/100GB Approx. 49 minutes/100GB
RAID5+0 6 Approx. 25 minutes/100GB Approx. 30 minutes/100GB Approx. 43 minutes/100GB
RAID6 6 Approx. 30 minutes/100GB Approx. 40 minutes/100GB Approx. 58 minutes/100GB
WARNING
D
o N
ot
• Do not remove system disks. Doing so will render the ETERNUS
DX60/DX80/DX90 unusable.
I
MPORTAN
T
System disks cannot be registered as hot spares.