Hi and Happy New year fellow NetBSD users,
I'm setting up a RAID5 NAS using NetBSD 6.1.2/amd64. The RAID5 array is used as a media storage system, it is composed of 3x2T SATA disks. I followed various on-line documents such as: http://www.netbsd.org/docs/guide/en/chap-rf.html http://mail-index.netbsd.org/netbsd-users/2011/09/02/msg008979.html http://abs0d.blogspot.fr/2011/08/setting-up-8tb-netbsd-file-server.html http://pbraun.nethence.com/unix/sysutils_bsd/raidframe.html I've copied about 10G of data composed of 1 to 100M files, everything went smoothly. Then, in order to have some performances figures, I used `dd' like this: $ dd if=/dev/zero of=./test bs=1m count=5000 withing a couple of seconds, the whole system becomes irresponsive and hangs totally but does not panic. I have reproduced this behaviour a couple of times, the system hangs everytime. Here's the RAID setup: $ cat /etc/raid1.conf START array # numRow numCol numSpare 1 3 0 START disks /dev/wd1a /dev/wd3a /dev/wd5a START layout # sectPerSU SUsPerParityUnit SUsPerReconUnit RAID_level_5 32 1 1 5 START queue fifo 100 and here's how I did the setup: dd if=/dev/zero of=/dev/rwd1d bs=8k count=1 dd if=/dev/zero of=/dev/rwd3d bs=8k count=1 dd if=/dev/zero of=/dev/rwd5d bs=8k count=1 disklabel -r -e -I wd1 # s/4.2BSD/RAID/ disklabel -r -e -I wd3 # s/4.2BSD/RAID/ disklabel -r -e -I wd5 # s/4.2BSD/RAID/ raidctl -v -C raid1.conf raid1 raidctl -v -I `date +%s` raid1 raidctl -v -A yes raid1 raidctl -i raid1 gpt add -b 128 raid1 dkctl raid1 addwedge export 128 7814058015 ffs newfs -O2 -b64k dk0 tunefs -m0 raid1 mount -o rw,log,async,noatime /dev/dk0 /export Any hint? Have someone already faced this issue? Thanks ------------------------------------------------------------------ Emile `iMil' Heitor .°. <imil@{home.imil.net,NetBSD.org,gcu.info}> _ | http://imil.net | ASCII ribbon campaign ( ) | http://www.NetBSD.org | - against HTML email X | http://gcu.info | & vCards / \