Public bug reported:
WDC WD7500BPVT 750GB Advanced format HDD
changing dirty_ratio or dirty_background_ratio prevents freezes but it slows
down HDD R/W operations
deadline scheduler is selected
parted informs that partitions are aligned
logical sectors are 512B while physical sectors are 4096 bytes
hdparm informs speed 96MB/s
Programs startup is slow.
S.M.A.R.T assessment is OK.
HDD operations make system unusable.
Hardware Specification
Intel Core-i7 3612qm
4GB DDR3 RAM
intel HD 4000m
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.16.0-49-generic 3.16.0-49.65~14.04.1
ProcVersionSignature: Ubuntu 3.16.0-49.65~14.04.1-generic 3.16.7-ckt15
Uname: Linux 3.16.0-49-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.13
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Sep 18 22:08:23 2015
InstallationDate: Installed on 2015-09-13 (5 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
SourcePackage: linux-lts-utopic
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-lts-utopic (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug trusty
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https://bugs.launchpad.net/bugs/1497383
Title:
While copying from hdd to hdd or hdd to usb ubuntu freezes
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