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2. Retention (maximum power-off duration) specification
Although the Flash Drive uses non-volatile memory, there is possibility of data
loss due to the natural electric discharge if it is not powered on for an
extended period of time. Refer the retention period with the below table.
Remaining write capacity
Retention (maximum power-off duration)
As the remaining write capacity decreases, the duration that data can be kept
without power becomes shorter. So, even when the device is stored, turn on
the server once every 3 months.
3. System memory requirement
Even though the driver of the Flash Drive manages NAND-type flash, it uses
system memory (RAM). Apart from the memory required for the OS and
applications, the driver requires 3 GB for each 1 TB of Flash Drive memory.
#
Required
memory
4. Regular backup
To protect against data loss, regularly back up data on the Flash Drive to an
auxiliary storage device. All data on the Flash Drive may be lost if the drive is
damaged.
5. Booting
The Flash Drive cannot function as a boot device.
6. Unanticipated shutdown
If an unanticipated shutdown occurs because of external factors such as power
cut, when the device restarts, data integrity is checked mandatorily. The
integrity check may take anywhere from a few minutes up to 10 minutes.
(When the OS starts, the progress information appears, as an increasing
percentage.) Note that while no data written to the Flash Drive will be lost as a
result of this unanticipated shutdown, data access is not possible while the
integrity check is still in progress.
When an unexpected shutdown occurs, a loading.lock file may be created for
security by Red Hat Enterprise Linux Server or ESXi, for which the Flash Drive
driver cannot be temporarily downloaded. If so, remove the loading.lock file to
load the driver.
1-4
HGST 1.1TB
PCIe Flash Drive
3 GB or more
Product Overview
PCIe Flash Drive FlashMAX2&3 User's Guide
90%
67%
5 years
18 months
HGST 2.2TB
PCIe Flash Drive
6 GB or more
50%
0%
9 months
3 months
HGST 4.8TB
PCIe Flash Drive
12 GB
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