Unmount an NVMe Storage Drive
Servicing CRUs That Do Not Require Server Power-Off
83
b.
To obtain the slot number (APIC ID) for the bus address, type the following
command to list all of the PCIe slot numbers and the corresponding bus
addresses:
#
egrep –H ‘.*’ /sys/bus/pci/slots/*/address
This commands returns output similar to the following:
/sys/bus/pci/slots/10/address:0000:b8:00
/sys/bus/pci/slots/11/address:0000:b6:00
/sys/bus/pci/slots/12/address:
0000:b2:00
(instance nvme0, pcie slot 12, drive label
nvme2)
/sys/bus/pci/slots/13/address:
0000:b4:00
(instance nvme1, pcie slot 13, drive label
nvme3)
In the above output, the bus addresses for the corresponding NVMe instances are
highlighted in bold text.
Note -
In the above output, notice that the instance names for the NVMe drives does not
correspond to the NVMe drive labels on the front of the server, that is, pci/slots/12/address:
0000:b2:00 corresponds to instance nvme0; however, on the front of the server, this drive is
labeled NVMe2. For a table that shows the relationship between the pci/slot# and the NVMe
storage drive label on the front of the server, see
“Server Operating System Names for the
NVMe Storage Drives” on page 45
.
c.
Disconnect all users of the NVMe drive and back up the NVMe drive data as
needed.
i.
Use the
umount
command to unmount any file systems that are mounted
on the device.
ii.
Remove the device from any multiple device (md) and Logical Volume
Manager (LVM) volume using it.
If the device is a member of an LVM Volume group, then it may be necessary
to move data off the device using the
pvmove
command, then use the
vgreduce
command to remove the physical volume, and (optionally)
pvremove
to remove the
LVM meta data from the disk.
iii.
If the device uses multipathing, run
multipath -l
and note all the paths
to the device. Then, remove the multipathed device using the
multipath
-f device
command.
iv.
Run the
blockdev --flushbufs device
command to flush any outstanding
I/O to all paths to the device.
Summary of Contents for X5-2L
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