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Forum Discussion
NV+ V2 stalling when 80%+ full (20047616)
i've recently purchased one of the Netgear ReadyNAS NV+ V2 units and have become very unhappy with it. it started out ok and could copy files to it at good rate, now that the unit is over 80% full i'v...
Well from the bit of testing things tonight changing the below settings didn't have any effect:
/sys/fs/ext4/dm-0/max_writeback_mb_bump = 4
/sys/fs/ext4/dm-0/mb_max_to_scan = 10
/sys/fs/ext4/dm-0/mb_min_to_scan = 2
/sys/block/dm-0/queue/scheduler = noop anticipatory deadline cfq (each of, it's on cfq by default)
/sys/block/sd[a-d]/queue/scheduler = noop (it's on cfq by default)
each time I copy large files the block allocator shoots up to queueing ~128mb worth of blocks (even tho max_writeback_mb_bump is set for 4mb)
/sys/fs/ext4/dm-0/delayed_allocation_blocks = 32767
from what I can see the “Filesystem_fix_5.3-arm.bin” made available prior changes /sys/fs/ext4/dm-0/mb_max_to_scan = 50. not sure what else it does, the default value for this setting is 200.
all of the above are runtime tweaks which would get reset upon reboot anyway so not really a long term fix (if it worked).
/sys/fs/ext4/dm-0/max_writeback_mb_bump = 4
/sys/fs/ext4/dm-0/mb_max_to_scan = 10
/sys/fs/ext4/dm-0/mb_min_to_scan = 2
/sys/block/dm-0/queue/scheduler = noop anticipatory deadline cfq (each of, it's on cfq by default)
/sys/block/sd[a-d]/queue/scheduler = noop (it's on cfq by default)
each time I copy large files the block allocator shoots up to queueing ~128mb worth of blocks (even tho max_writeback_mb_bump is set for 4mb)
/sys/fs/ext4/dm-0/delayed_allocation_blocks = 32767
from what I can see the “Filesystem_fix_5.3-arm.bin” made available prior changes /sys/fs/ext4/dm-0/mb_max_to_scan = 50. not sure what else it does, the default value for this setting is 200.
all of the above are runtime tweaks which would get reset upon reboot anyway so not really a long term fix (if it worked).
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