Disk rescan will change max_sectors_kb to default value
- How to make max_sectors_kb persistent for multipath devices. In multipath.conf, max_sectors_kb 4096 was defined. After doing 'systemctl reload multipathd' value of max_sectors_kb turn to 4096 for all disks (the disk sdc is taken for an example).
If performing disk rescan for sdc , max_sectors_kb will turn back to default value 512
# cat /sys/block/sdc/queue/max_sectors_kb 4096 # echo 1 > /sys/devices/pci0000:00/0000:00:01.0/0000:04:00.0/host0/rport-0:0-0/target0:0:0/0:0:0:1/rescan # cat /sys/block/sdc/queue/max_sectors_kb 512
The issue was seen on RHEL7.3 but not observed on RHEL7.2.
How to make make max_sectors_kb parameter persistence ?
- Red Hat Enterprise Linux 7.3
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