Bonjour à tous,
c’est mon premier post sur ce forum et c’est bien évidemment pour un problème que je fais appel à vous.
J’espère arriver à vous fournir les infos nécessaires à l’identification, voire la résolution du problème.
Voilà, depuis qq jours, ma Debian6 est devenue lente, le moniteur système montre des pics d’IOwait à 100% par intermittence.
Inutile de vous dire que c’est complètement corréler avec les “gels” du système.
Ouvrir un petit fichier texte dans VI peut prendre jusqu’à 10 secondes, c’est assez énervant pour travailler…
Mon PC est un portable Dell Latitude E6420, qui n’a que 6 mois.
$ uname -a
Linux HOSTNAME 3.2.0-0.bpo.2-amd64 #1 SMP Mon Apr 23 08:38:01 UTC 2012 x86_64 GNU/Linux
$ lspci
00:00.0 Host bridge: Intel Corporation Sandy Bridge DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Sandy Bridge PCI Express Root Port (rev 09)
00:16.0 Communication controller: Intel Corporation Cougar Point HECI Controller #1 (rev 04)
00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04)
00:1a.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation Cougar Point High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 1 (rev b4)
00:1c.1 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 2 (rev b4)
00:1c.2 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 3 (rev b4)
00:1c.3 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 4 (rev b4)
00:1c.5 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 6 (rev b4)
00:1d.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation Cougar Point LPC Controller (rev 04)
00:1f.2 RAID bus controller: Intel Corporation Mobile 82801 SATA RAID Controller (rev 04)
00:1f.3 SMBus: Intel Corporation Cougar Point SMBus Controller (rev 04)
01:00.0 VGA compatible controller: nVidia Corporation Device 1056 (rev a1)
01:00.1 Audio device: nVidia Corporation Device 0e08 (rev a1)
03:00.0 Network controller: Intel Corporation Centrino Ultimate-N 6300 (rev 35)
0b:00.0 SD Host controller: O2 Micro, Inc. Device 8221 (rev 05)
0b:00.1 Mass storage controller: O2 Micro, Inc. Device 8231 (rev 03)
J’ai regardé les processus qui pourraient poser problème.
# iotop -ako
265 be/3 root 0.00 K 25384.00 K 0.00 % 15.91 % [jbd2/sda1-8]
1093 be/3 root 0.00 K 90824.00 K 0.00 % 13.75 % [jbd2/sda6-8]
1352 be/4 root 0.00 K 532.00 K 0.00 % 0.67 % tinyproxy
1278 be/4 root 1056.00 K 0.00 K 0.00 % 0.66 % [flush-8:0]
Cela ressemble à un problème de disque dur.
Disk Utility m’indique 17 secteurs défectueux, ce qui est peu je crois.
Cependant, en bootant avec un LiveCD Ubuntu 12.04, j’ai lancé des tests sur le disque dur.
# e2fsck -cfpv /dev/sda
Rien à signaler.
# badblocks -nvs
RAS.
J’ai fait un test de vitesse de lecture, dont les résultats sont faibles, mais variables.
# for i in `seq 5`; do hdparm -t /dev/sda ; done
/dev/sda:
Timing buffered disk reads: 2 MB in 4.43 seconds = 462.60 kB/sec
/dev/sda:
Timing buffered disk reads: 2 MB in 4.39 seconds = 466.32 kB/sec
/dev/sda:
Timing buffered disk reads: 50 MB in 3.01 seconds = 16.59 MB/sec
/dev/sda:
Timing buffered disk reads: 2 MB in 4.38 seconds = 467.75 kB/sec
/dev/sda:
Timing buffered disk reads: 2 MB in 4.38 seconds = 467.50 kB/sec
Plus d’infos sur le disque dur.
[code]# fdisk -l
Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0002ebbc
Device Boot Start End Blocks Id System
/dev/sda1 1 2675 21483520 83 Linux
/dev/sda2 2675 38914 291085313 5 Extended
/dev/sda5 2675 3648 7811072 82 Linux swap / Solaris
/dev/sda6 3648 38914 283273216 83 Linux
[/code]
[code]# hdparm -I /dev/sda
/dev/sda:
ATA device, with non-removable media
Model Number: TOSHIBA MK3261GSYN
Serial Number: 71TBT0X9T
Firmware Revision: MH000D
Transport: Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6
Standards:
Supported: 8 7 6 5
Likely used: 8
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
CHS current addressable sectors: 16514064
LBA user addressable sectors: 268435455
LBA48 user addressable sectors: 625142448
Logical Sector size: 512 bytes
Physical Sector size: 512 bytes
device size with M = 10241024: 305245 MBytes
device size with M = 10001000: 320072 MBytes (320 GB)
cache/buffer size = 16384 KBytes
Form Factor: 2.5 inch
Nominal Media Rotation Rate: 7200
Capabilities:
LBA, IORDY(can be disabled)
Queue depth: 32
Standby timer values: spec’d by Standard, no device specific minimum
R/W multiple sector transfer: Max = 16 Current = 16
Advanced power management level: 128
Recommended acoustic management value: 254, current value: 254
DMA: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* SMART feature set
Security Mode feature set
* Power Management feature set
* Write cache
* Look-ahead
* Host Protected Area feature set
* WRITE_BUFFER command
* READ_BUFFER command
* NOP cmd
* DOWNLOAD_MICROCODE
* Advanced Power Management feature set
SET_MAX security extension
Automatic Acoustic Management feature set
* 48-bit Address feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
* General Purpose Logging feature set
* WRITE_{DMA|MULTIPLE}_FUA_EXT
* 64-bit World wide name
* IDLE_IMMEDIATE with UNLOAD
* WRITE_UNCORRECTABLE_EXT command
* {READ,WRITE}_DMA_EXT_GPL commands
* Segmented DOWNLOAD_MICROCODE
* Gen1 signaling speed (1.5Gb/s)
* Gen2 signaling speed (3.0Gb/s)
* Native Command Queueing (NCQ)
* Host-initiated interface power management
* Phy event counters
* Idle-Unload when NCQ is active
* unknown 76[13]
* unknown 76[14]
* DMA Setup Auto-Activate optimization
Device-initiated interface power management
* Software settings preservation
* SMART Command Transport (SCT) feature set
* SCT LBA Segment Access (AC2)
* SCT Error Recovery Control (AC3)
* SCT Features Control (AC4)
* SCT Data Tables (AC5)
Security:
Master password revision code = 65534
supported
not enabled
not locked
frozen
not expired: security count
supported: enhanced erase
74min for SECURITY ERASE UNIT. 74min for ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 5000039361509915
NAA : 5
IEEE OUI : 000039
Unique ID : 361509915
Checksum: correct
[/code]
Voilà, je m’arrête là pour la description du problème.
J’ai peur que ce soit la fin de mon disque dur, mais si par hasard, cela pouvait se régler sans le changer ce serait pas mal.
Merci d’avance pour votre aide et bonne journée.
