Re: [CentOS] Disk Performance Issue
On 6/24/19 8:42 AM, Chris Olson via CentOS wrote: We have a very old Dell desk top machine that has been running CentOS 6 for the past five years. It received a new, 1 TB disk ... Boot-up this morning lasted about six times as long as usual. Disk access, as indicated by the disk activity light, is almost continuous Is it running software raid? Check the output of "cat /proc/mdstat" to see if it's re-syncing an array. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Disk Performance Issue
On Mon, Jun 24, 2019 at 03:42:24PM +, Chris Olson via CentOS wrote: > We have a very old Dell desk top machine that has been running > CentOS 6 for the past five years. It received a new, 1 TB disk > and additional memory before the OS installation. It has been > the primary Linux machine in our smallest and most remote field > office. It has been updated at least once a week and has all > current dates installed. > > Boot-up this morning lasted about six times as long as usual. > Disk access, as indicated by the disk activity light, is almost > continuous and for extended periods of time when ever something > is done that requires the disk. Everything observed happens > whether or not the machine is connected to our network. All of > our files appear to be accessible if one is patient. > > One theory put forward is that some application is running that > uses up CPU and disk bandwidth. Another theory is that thereare disk errors, > mostly corrected by EDCS features. We do not > see any rogue applications and error logs show no disk issues. > > This is a mysterious issue that we hope to circumvent by putting > a new disk and installing CentOS 7 from DVD. Our hope is that > the current disk can be mounted externally on the new CentOS > system using a USB to SATA adapter and that data can be moved > off of the old disk. > > Advice regarding this issue and any possible diagnostic methods > will be greatly appreciated. > > df -k output: > +++ > Filesystem 1K-blocks Used Available Use% Mounted on > /dev/mapper/vg_delle520-lv_root > 51475068 12110896 36742732 25% / > tmpfs 1928152 176 1927976 1% /dev/shm > /dev/sda1 487652 211073 250979 46% /boot > /dev/mapper/vg_delle520-lv_home > 905124888 246856176 612284356 29% /home > +++ > If it had not been booted in a while, it may have been running the file system check (fsck) program. I think if fsck has not been run in 6 months, it automatically happens at boot. jl -- Jon H. LaBadie j...@jgcomp.com 11226 South Shore Rd. (703) 787-0688 (H) Reston, VA 20190 (703) 935-6720 (C) ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Disk Performance Issue
Chris Olson via CentOS wrote: > We have a very old Dell desk top machine that has been running > CentOS 6 for the past five years. It received a new, 1 TB disk > and additional memory before the OS installation. It has been the primary > Linux machine in our smallest and most remote field > office. It has been updated at least once a week and has all current dates > installed. > > Boot-up this morning lasted about six times as long as usual. > Disk access, as indicated by the disk activity light, is almost > continuous and for extended periods of time when ever something is done > that requires the disk. Everything observed happens whether or not the > machine is connected to our network. All of our files appear to be > accessible if one is patient. > > One theory put forward is that some application is running that > uses up CPU and disk bandwidth. Another theory is that thereare disk > errors, mostly corrected by EDCS features. We do not see any rogue > applications and error logs show no disk issues. > > This is a mysterious issue that we hope to circumvent by putting > a new disk and installing CentOS 7 from DVD. Our hope is that the current > disk can be mounted externally on the new CentOS system using a USB to > SATA adapter and that data can be moved > off of the old disk. > > Advice regarding this issue and any possible diagnostic methods > will be greatly appreciated. > > df -k output: > +++ > Filesystem 1K-blocks Used Available Use% Mounted on > /dev/mapper/vg_delle520-lv_root > 51475068 12110896 36742732 25% / > tmpfs 1928152 176 1927976 1% /dev/shm > /dev/sda1 487652 211073 250979 46% /boot > /dev/mapper/vg_delle520-lv_home > 905124888 246856176 612284356 29% /home > +++ > If there's nothing in /var/log/messages, then my next trick would be to do a smartctl -t short, and wait for the results. Also, have you done an ipmitool sel list? mark ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Disk Performance Issue
Chris Olson wrote: > One theory put forward is that some application is running that > uses up CPU and disk bandwidth. 1. Check the cable. I'm getting convinced that half of all problems are caused by cables. 2. Use iotop to see what's using the disk. 3. Check the disk using smartmontools and badblocks (not in destructive mode). -- Yves Bellefeuille ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Disk Performance Issue
On Mon, Jun 24, 2019 at 10:42 AM Chris Olson via CentOS wrote: > Advice regarding this issue and any possible diagnostic methods > will be greatly appreciated. > Install smartmontools. You can use the smartctl tool to get all of the S.M.A.R.T. data for the drive. You can also set up the config to email you (or whoever) when a S.M.A.R.T. error occurs. ___ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
