=D0=92 =D1=81=D0=BE=D0=BE=D0=B1=D1=89=D0=B5=D0=BD=D0=B8=D0=B8 =D0=BE=D1=82 =
4 =D0=B0=D0=B2=D0=B3=D1=83=D1=81=D1=82=D0=B0 2010 20:45:26 =D0=B2=D1=8B =D0=
=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=BB=D0=B8:
> on 04/08/2010 15:08 Alex V. Petrov said the following:
> > Hi All!
> >=20
> > $ dd if=3D/dev/random of=3D/tank/test bs=3D3M count=3D1000
>=20
> /dev/random is slow.
On single disk (UFS) speed of write faster:
$ dd if=3D/dev/random of=3D/home/alex/temp/test bs=3D3M count=3D1000
1000+0 records in
1000+0 records out
3145728000 bytes transferred in 75.778427 secs (41512184 bytes/sec)
Result for /dev/zero:
$ dd if=3D/dev/zero of=3D/tank/test bs=3D3M count=3D1000
1000+0 records in
1000+0 records out
3145728000 bytes transferred in 113.110421 secs (27811124 bytes/sec)
In Krusader speed copying files from a single disk to an pool of about 8 MB=
/s
=46ragment of `systat -v 1` in proces copying:
Disks ada0 ada1 ada2 ada3 ada4
KB/t 0,00 122 44,35 32,89 48,50
tps 0 54 56 53 54
MB/s 0,00 6,42 2,42 1,70 2,55
%busy 0 11 7 4 82
=2D----
Alex V. Petrov
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