Huawei 5288 V3 V100R003 User Manual page 36

5288 V3 Server
User Guide
No. Compone
6
7
Issue 26 (2018-11-19)
Function
nt
SD card SD cards use flash memory and SPIs to store data. Currently, NAND
flash memory is mostly used in the industry. NAND flash memory
stores electrons on the floating gate to store data. However, electrons
frequently passing through the floating gate will weaken the gate's
ability to store electrons and eventually make the gate unable to store
electrons. This problem is common to NAND flash memory. The
amount of service data to be written needs to be assessed to prevent
component failures.
NOTE
l An SD card can be used only as a boot device for OSs.
l SD cards have weak endurance and cannot be used as data storage devices.
Use enterprise-level HDDs or SSDs to replace SD cards for data storage
when frequent data erase operations are involved.
l Installing write-intensive service software on SD cards will accelerate the
write life consumption and result in perpetual damage of SD cards. SD
cards cannot be used for such services.
l SD cards cannot be used in cache scenarios.
Dual-SD Provides two SD card slots. Each slot supports an SD card of up to 32
card GB. SD cards can be used as the boot media of the server. After the
module iBMC initialization is complete, two SD cards are configured as a
RAID 1 array when being detected. You can view the information
about the SD cards and RAID 1 array on the iBMC WebUI by
choosing System Info > Other, but cannot modify the configuration
or manually configure them.
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