IBM Power System 9040-MR9 Manual page 58

Using the Linux fuel gauge command on a mainstream SSD
Learn how to use the Linux operating system fuel gauge command to find the amount of remaining life in a
mainstream solid-state drive (SSD).
About this task
To use the Linux operating system fuel gauge command, complete the following steps:
Procedure
1. If the system has logical partitions, complete this procedure from the logical partition that owns the
SSD.
2. Choose from the following options:
• To use the iprconfig command, continue with step "3" on page 44.
• To use the ssd-report command in the iprutils command-line interface, continue with step "4"
on page 44.
3. To use the iprconfig command, complete the following steps:
a) Type $ iprconfig
b) In the main menu, select the Devices Statistics option.
c) In the Device selection screen, select Read Intensive SSD (Mainstream SSD) by moving the cursor
to the correct line and pressing 1.
d) Press Enter to confirm. The statistics for the selected device is shown.
e) Review the information in the first block of information.
f) Continue with step "5" on page 44.
4. To use the ssd-report command in the iprutils command-line interface, complete the following
steps:
a. Type $ iprconfig -c ssd-report <dev>
Where <dev> is the device you want to use.
b. Review the information that is shown.
c. Continue with step "5" on page 44.
5. Interpret the statistics:
• Total Bytes Written: Number of GB already written to the device
• Number of Bytes reported by Warranty: Number of GBs that can be written according to the
specification
• Life Remaining Gauge: An estimate of how much of the device's life is consumed
• PFA Trip: The device detected an issue that might lead to a failure
• Power-on Days: Number of days since the last power-on
6. Is the value in the Life Remaining Gauge field less than or equal to 2 percent?
• Yes: Continue with the next step.
• No: The mainstream SSD is not reporting a change in status for the number of write operations
available.
7. Is the value in the Life Remaining Gauge field 0 percent?
• Yes: Continue with step "8" on page 44.
• No: Continue with step "9" on page 45.
8. The mainstream SSD reached the limit for the number of write operations that are supported. Write
operations to the SSD become slower over time, and at some point the SSD becomes a read-only
drive. When the operating system writes to the read-only drive, the write operations are rejected, and
the operating system considers the drive as if a failure occurred. For example, if the operating system
44 Power Systems: Disk drives or solid-state drives