another error with md malloc based fs

Hi,
first i have 2GB of RAM, there are be 1,6G free
so it should enough toi make the following:

# mdconfig -a -t mallo -s 750m -u 0
# bsdlabel -w /dev/md0
# bsdlabel -e /dev/md0 (create "a" slice to use all free respective first 16
blocks)
# newfs -O2 -U /dev/md0a
mount /dev/md0a /mnt
# cd to_a_place/with/650MB_of_data/
# tar -cf - |( cd /mnt/; tar -xf -)
after ~256MB transferred i get following errors, and the system crashes
horridble.... first it doesnt react of anything, then it does silently
reboot
without a shutdown.......leaves all unclean....

extract from all.log
Mar 22 22:08:14 flying-dutchman kernel:
g_vfs_done():md0a[WRITE(offset=686899200
, length=131072)]error = 28
Mar 22 22:08:14 flying-dutchman kernel:
g_vfs_done():md0a[WRITE(offset=687030272
, length=131072)]error = 28
Mar 22 22:08:14 flying-dutchman kernel:
g_vfs_done():md0a[WRITE(offset=687161344
, length=131072)]error = 28
Mar 22 22:08:14 flying-dutchman kernel:
g_vfs_done():md0a[WRITE(offset=687292416
, length=131072)]error = 28


Any impressions, suggestions or limitations for md with malloc?
This errors occures also if i request to reserve the space by creation....

thanks

regards

michael

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@: michael.schuh@xxxxxxxxx

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