Полностью повисает ядро при копировании больших файлов на другой раздел внутри RAID5.

Здравствуйте уважаемые!

Столкнулся с такой проблемой. Есть RAID5 собранный средствами mdadm (/dev/md127), который разбит на 2 раздела (md127p1 и md127p2). На обоих разделах reiserfs. Второй раздел помимо прочего экспортируется по NFS. Всё работает, массив не повреждён и полностью синхронизирован. SMART говорит диски в порядке. И даже всё копируется, но при копировании файла около 700 Мб зависает всё колом, даже мышь, где-то на 80 процентах и спасает только reset. При этом в логах полная тишина. После сброса естественно запускается fsck, а затем синхронизация массива. С hdparm не игрался, поэтому всё по-умолчанию. Кто-нибудь сталкивался с подобной проблемой? В какую сторону копать?

Спасибо.

Вот некоторая информация о системе:
# emerge --info

Portage 2.1.10.19 (default/linux/amd64/10.0/desktop/kde, gcc-4.5.3, glibc-2.13-r4, 3.0.4-gentoo x86_64)                                                                             
=================================================================                                                                                                                   
System uname: Linux-3.0.4-gentoo-x86_64-AMD_Phenom-tm-_II_X6_1090T_Processor-with-gentoo-2.0.3                                                                                      
Timestamp of tree: Fri, 23 Sep 2011 00:45:01 +0000                                                                                                                                  
distcc 3.1 x86_64-pc-linux-gnu [enabled]                                                                                                                                            
ccache version 3.1.6 [disabled]                                                                                                                                                     
app-shells/bash:          4.2_p10
dev-java/java-config:     2.1.11-r3
dev-lang/python:          2.7.2-r3, 3.2.2
dev-util/ccache:          3.1.6
dev-util/cmake:           2.8.5-r2
dev-util/pkgconfig:       0.26
sys-apps/baselayout:      2.0.3
sys-apps/openrc:          0.9.3-r1
sys-apps/sandbox:         2.5
sys-devel/autoconf:       2.13, 2.68
sys-devel/automake:       1.9.6-r3, 1.10.3, 1.11.1-r1
sys-devel/binutils:       2.21.1-r1
sys-devel/gcc:            4.5.3-r1
sys-devel/gcc-config:     1.4.1-r1
sys-devel/libtool:        2.4-r1
sys-devel/make:           3.82-r3
sys-kernel/linux-headers: 2.6.39 (virtual/os-headers)
sys-libs/glibc:           2.13-r4
Repositories: gentoo sunrise gamerlay-stable calculate
ACCEPT_KEYWORDS="amd64 ~amd64 ~x86"
ACCEPT_LICENSE="*"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=amdfam10 -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /var/lib/hsqldb"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5.3/ext-active/ /etc/php/cgi-php5.3/ext-active/ /etc/php/cli-php5.3/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/splash /etc/terminfo"
CXXFLAGS="-march=amdfam10 -O2 -pipe"
DISTDIR="/usr/portage/distfiles"
EMERGE_DEFAULT_OPTS="--jobs=3 --autounmask=y"
FEATURES="assume-digests binpkg-logs distcc distlocks ebuild-locks fixlafiles fixpackages metadata-transfer news parallel-fetch protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch"
FFLAGS=""
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="ru_RU.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
LINGUAS="ru"
MAKEOPTS="-j9"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/var/lib/layman/sunrise /var/lib/layman/gamerlay /var/lib/layman/calculate"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="3dnow 3dnowext 7zip S3TC X Xaw3d a52 aac acl acpi aim akode alsa amarok amd64 amr amrnb amrr amrwb animgif ao apache2 apng aspell async audiofile audit automount barcode bash-completion berkdb bittorrent bl blas bluetooth boost branding bzip2 c++ cairo caps ccache cdda cdio cdr chardet chm cli clisp consolekit cpudetection cracklib crypt cups cupsddk curl cursors cvs cxx dbus declarative deflate designer-plugin device-mapper devil dhcp dialup divx djvu dmi dri dssi dts dv dvd dvdr dvdread editor elf embedded emboss enca encode examples exif expat extra-algorithms extra-cardsets extras fam fat fbcon fbcondecor fbsplash ffmpeg fftw firefox fits flac float fltk fluidsynth flv fontconfig fontforge foomaticdb fortran fpx ftp fts3 fuse fusion gammu gd gdbm gdu gecko geoip gif gimp git glib glibc-omitfp glitz glut gnuplot gnutella gnutls gphoto2 gpm graphviz grub gs gsm gstreamer gtk guile gzip hddtemp hpcups icons iconv icq icu id3tag ieee1394 imap imlib ipv6 irc jabber jack jad java javascript jbig joystick jpeg kde kdm kig-scripting kipi ladspa lame lash lcms ldap libnotify libsamplerate libssh2 libwww lirc lm_sensors logitech-mouse logrotate logviewer logwatch lua lzma lzo mad mdadm midi mikmod mime minizip mktemp mmap mmx mmxext mng modplug modules motif mozilla mp3 mp4 mpeg mplayer mppe-mppc mudflap multilib musepack music musicbrainz mysql mysqli ncurses nemesi network networking nls nova nptl nptlonly nsplugin nspluginwrapper ntfs ntp nvidia obex ocr odbc ogg ogg123 openal openexr opengl openmp oss pam pango pascal pcre pdf pdo perl phonon pixmaps plasma png policykit posix postgres ppds pppd pptp print private-headers python qt3 qt3support qt4 quicktime rar rdesktop readline reiser4 reiserfs rss rtc rtsp ruby samba sbig scanner sdl secure-delete semantic-desktop sensord session sid skins sms sndfile sockets sound soundtouch speex spell sql sqlite sqlite3 sse sse2 ssh ssl startup-notification stream subversion svg sysfs syslog sysvipc tcl tcpd themes theora threads tiff tk tordns truetype tunepimp udev unicode usb userlocales utils v4l v4l2 valgrind vcd vhosts videos visualization vlc vnc voice vorbis wav wavpack weather webinterface webkit winbind wireshark wma wmf wxwindows x264 xanim xcb xcomposite xine xinerama xinetd xml xmlrpc xorg xosd xpm xscreensaver xsl xterm xulrunner xv xvid zip zlib" ALSA_CARDS="intel8x0 ice1724" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan stage tables krita karbon braindump" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" FOO2ZJS_DEVICES="hp1020" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="ru" LIRC_DEVICES="devinput" PHP_TARGETS="php5-3" RUBY_TARGETS="ruby18" USERLAND="GNU" VIDEO_CARDS="nvidia" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  CPPFLAGS, CTARGET, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

# cat /etc/fstab

..
# RAID 5
/dev/md127p1            /home                   reiserfs        defaults,auto,noatime,nodiratime,notail                 0 0
/dev/md127p2            /mnt/mainstorage        reiserfs        defaults,auto,noatime,nodiratime,notail                 0 0
..

# cat /proc/mdstat

Personalities : [raid6] [raid5] [raid4] [multipath] [faulty] 
md127 : active raid5 sdb1[0] sdd1[3] sdc1[1]
      1465146368 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]
      
unused devices: <none>

# lspci

00:00.0 Host bridge: ATI Technologies Inc RX780/RX790 Chipset Host Bridge
00:02.0 PCI bridge: ATI Technologies Inc RD790 PCI to PCI bridge (external gfx0 port A)
00:06.0 PCI bridge: ATI Technologies Inc RD790 PCI to PCI bridge (PCI express gpp port C)
00:09.0 PCI bridge: ATI Technologies Inc RD790 PCI to PCI bridge (PCI express gpp port E)
00:11.0 SATA controller: ATI Technologies Inc SB700/SB800 SATA Controller [AHCI mode] (rev 40)
00:12.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller
00:12.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller
00:13.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller
00:13.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller
00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 42)
00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA) (rev 40)
00:14.3 ISA bridge: ATI Technologies Inc SB700/SB800 LPC host controller (rev 40)
00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge (rev 40)
00:14.5 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI2 Controller
00:15.0 PCI bridge: ATI Technologies Inc Device 43a0
00:15.1 PCI bridge: ATI Technologies Inc Device 43a1
00:16.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller
00:16.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller
00:18.0 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] HyperTransport Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Miscellaneous Control
00:18.4 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Link Control
01:00.0 VGA compatible controller: nVidia Corporation Device 1040 (rev a1)
01:00.1 Audio device: nVidia Corporation Device 0e08 (rev a1)
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 01)
03:00.0 USB Controller: NEC Corporation Device 0194 (rev 04)
04:07.0 Multimedia controller: Philips Semiconductors SAA7134/SAA7135HL Video Broadcast Decoder (rev 01)
04:08.0 Multimedia audio controller: VIA Technologies Inc. VT1720/24 [Envy24PT/HT] PCI Multi-Channel Audio Controller (rev 01)
04:0e.0 FireWire (IEEE 1394): Texas Instruments TSB43AB23 IEEE-1394a-2000 Controller (PHY/Link)
05:00.0 SATA controller: JMicron Technology Corp. JMB362/JMB363 Serial ATA Controller (rev 02)
05:00.1 IDE interface: JMicron Technology Corp. JMB362/JMB363 Serial ATA Controller (rev 02)
06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)