% df -h
Filesystem                   Size    Used   Avail Capacity  Mounted on
selena/downloads0             61G     59G    1.7G    97%    /downloads0

% dd if=/downloads0/Уральские\ пельмени/25.\ Уральские\ пельмени.\ \ Зе\ BAD\ –\ Худшее\!\ \(2012.04.01\).avi of=/dev/null bs=1048576 count=1024
790+1 records in
790+1 records out
828631040 bytes transferred in 30.008953 secs (27612794 bytes/sec)

% dd if=/downloads0/Уральские\ пельмени/25.\ Уральские\ пельмени.\ \ Зе\ BAD\ –\ Худшее\!\ \(2012.04.01\).avi of=/dev/null bs=1048576 count=1024
790+1 records in
790+1 records out
828631040 bytes transferred in 0.427684 secs (1937484000 bytes/sec)

% dd if=/downloads0/Уральские\ пельмени/25.\ Уральские\ пельмени.\ \ Зе\ BAD\ –\ Худшее\!\ \(2012.04.01\).avi of=/dev/null bs=1048576 count=1024
790+1 records in
790+1 records out
828631040 bytes transferred in 0.477275 secs (1736171437 bytes/sec)

% zpool status selena
  pool: selena
state: ONLINE
  scan: scrub repaired 0 in 6h41m with 0 errors on Mon May 21 01:10:34 2012
config:

    NAME        STATE     READ WRITE CKSUM
    selena      ONLINE       0     0     0
      ada3p3    ONLINE       0     0     0

errors: No known data errors

% smartctl -a /dev/ada3
smartctl 5.43 2012-06-30 r3573 [FreeBSD 9.1-PRERELEASE amd64] (local build)
Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Caviar Blue Serial ATA
Device Model:     WDC WD6400AAKS-65A7B2
Serial Number:    WD-WCASY8631846
LU WWN Device Id: 5 0014ee 1acc38eb5
Firmware Version: 01.03B01
User Capacity:    640 135 028 736 bytes [640 GB]
Sector Size:      512 bytes logical/physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   8
ATA Standard is:  Exact ATA specification draft version not indicated
Local Time is:    Sun Aug 26 14:51:55 2012 VOLT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

Учись, студент. :)