All Questions
13
questions
0
votes
0
answers
195
views
Bad disk write performance & high PSI
I'm currently running into an issue where writing files is causing insanely high pressure on the I/O side:
It goes so far that the system even stalls for a few seconds then writes a bit, stalls again,...
- 1
0
votes
1
answer
57
views
HDD I/O fast at first but gradually decreases? [duplicate]
I was benchmarking my WD 500 GB HDD in Ubuntu Disks several times and saw that the read speeds started at 140 MB/s, but it consistently would gradually decrease by a few MB/s with seemingly no floor. ...
- 113
1
vote
0
answers
778
views
High percentage of IO in iotop
I have a problem with a very slow process (mongod), so I downloaded iotop to see how is my drive going.
I can see a very high percentage in the IO< column, constantly about 70-99%. Can someone ...
- 111
0
votes
1
answer
519
views
How do I set /sys/block/X/queue/scheduler on Ubuntu 18.04 with HWE on startup
I am running Ubuntu 18.04 (Bionic) with the HWE stack installed. This means I have the 5.3 Linux kernel running.
In older versions of the kernel, apparently passing elevator=noop when GRUB starts the ...
- 194
2
votes
0
answers
2k
views
Cannot diagnose slow disk read speed, bottleneck, in Ubuntu
I have the same processes running on 2 (or more machines) for which we notice a massive slow down in disk i/o on some machines. The PCs have very similar hardware (I am happy to post dmidecode if ...
- 121
0
votes
0
answers
2k
views
Unable to mount DVD - unable to read superblock
I bought a Documentary DVD online, but when I inserted the DVD into a Windows machine, nothing happened. So, I tried with Ubuntu, and same thing happened.
When I checked dmesg after I inserted the ...
- 1
0
votes
2
answers
277
views
What's the use of providing number of partitions when partitioning a hard disk?
I'm trying to partition my hard disk to make it usable. I'm following the steps given in this link to partition my hard disk. I'm doing this by providing the number of partitions as 1 and choosing the ...
- 113
1
vote
0
answers
28
views
Mouting error bash on ubutun on Windows
I was running md5sum on a usb hard-drive via bash on Windows, but I had to terminated the program because of some errors. I tried to remount the drive and gives no error , but I was unable to cd ( ...
- 11
0
votes
1
answer
576
views
mounted local network synology folder : Input/Output error when tryign to write inside files
/etc/fstab mounts local network synology folder in Ubuntu 14.04 LTS like this:
//<numeric synology ip>/<synology_folder_name> /home/<user>/<mount_folder> cifs credentials=/...
- 251
1
vote
0
answers
413
views
Flash drive works in read only, not on read/write [duplicate]
I have a 32GB Imation flash drive with a physical read-only switch.
A while ago I used it to install Ubuntu, and to do so I created a bootable USB. It worked, I installed Ubuntu, everything worked ...
- 121
2
votes
1
answer
4k
views
Ubuntu not recognizing external hard drive
I have 2TB Wester Digital external hard drive. I connected it to USB 3.0 port on my laptop with Ubuntu 14.04 (64 bit) installed. It was working fine till yesterday (Haven't tried on any other OS). ...
- 21
0
votes
0
answers
2k
views
Input/output error when reading disk
I did a forced shutdown after my computer froze (on Ubuntu). After turning back on I found a "attempt to read or write outside of disk hd0" error, after choosing Ubuntu on GRUB.
I haven then ...
- 101
1
vote
0
answers
93
views
Can random writes to a non-formatted raw partition from linux corrupt the boot loader?
In brief: suppose I create a non-formatted raw partition on my hard drive, and read and write block IOs to and from it using the standard c interface: open, pread, pwrite, etc. Is there any reason why ...
- 11