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Installing a Disk Module
After the C72 node is installed into a cabinet, install the disk module.
Prerequisites
Ensure that the following condition is met before installing the disk module:
A C72 node has been installed into the cabinet.
Ensure that
the following tools and materials are ready:
- Phillips screwdriver
- M6 screw
- disk module
Context
Restricted by the storage principles, SSDs and HDDs such as NL-SAS,
SAS and SATA disks cannot be preserved for a long term while they
are powered off.
- SSDs where no data is stored can be preserved for a maximum of 12 months while they are powered off. SSDs where data has been stored can be preserved for a maximum of 3 months while they are powered off. If the maximum preservation time is exceeded, data loss or SSD failure may occur.
- Packed HDDs can be preserved for a maximum of six months. Unpacked HDDs that are powered off can be preserved for a maximum of six months too. If the maximum preservation time is exceeded, data loss or disk failure may occur.
- The maximum preservation time is determined based on the disk preservation specifications provided by the HDD vendor. For details about the specifications, see the manual provided by the vendor.
Procedure
- Press the handles on the front panel of the system enclosure and pull out the system enclosure, as shown in Figure 8-81.
- Insert a disk vertically into a vacant disk slot in the
system enclosure and close the disk handle, as shown in Figure 8-82.
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To ensure favorable heat dissipation, install disk modules in the following sequences. Insert filler panels into vacant disk slots if there are any.- Evenly allocate disk modules to controller modules A and B. Install disk modules into controller module A first and then into controller module B.
- The disk modules for controller module A are E0 to E14, D0 to D14, C0 to C3, and C11 to C14, excepting E7 (a cascading module) and D7 (a reserved vacant slot). See Figure 8-83.
- The disk modules for controller module B are C4 to C10, B0 to B14, and A0 to A14, excepting C7 (a cascading module).
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