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Questions tagged [hard-drive]

Questions about hard disks' performance, issues, tips, and software.

Questions about hard disks performance, issues, tips, and related software, e.g. data recovery or disk test software.

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How to determine disc spindown time

I am able to set both APM and spindown times using the command: hdparm -S 246 -B 128 /dev/sda Unfortunately I can only find the APM value in the information output: hdparm -I /dev/sda | grep Advanced How can I see the spindown time value? I…
lzap
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Linux: How to see live numbers of bytes/second transferred to/from hard drive?

I want to see something for Linux similar to the Perfmon program under Windows. Does such a thing exist that is terminal friendly and not a gui program? Thanks.
eee
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Does this SMART selftest indicate a failing drive?

I'm wondering if the results of this SMART selftest indicate a failing drive, this is the only drive that comes up with 'completed: read failure' in the results. # smartctl -l selftest /dev/sde smartctl version 5.38 [i686-pc-linux-gnu] Copyright (C)…
Jeff Welling
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Virtualbox booting from a real drive?

I'm about to take the plunge and install Win7 RC1 on my desktop machine. However I want to preserve access to my old HDD with XP on it. I don't really want to use full dual-boot since that would leave my new Win7 install on the d:\ drive, which it…
Alnitak
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How do I measure disk thrashing on linux?

How do I accurately observe and measure the amount of virtual memory utilization and activity on Linux? I know there is vmstat, but how do I interpret the results? Or, what is better?
randomx
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Disk Usage Analyzer on Synology

How can I get an overview of the disk usage on a Synology hard drives like this:
kimliv
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Relation between disk IOPS and sar tps

I'm trying to estimate IOPS requirements of my application running on 32-bit CentOS 6.2. I started to take some measurement on a machine with SATA disks and I'm quite confused of difference between IOPS and tps measured by sar. According to…
pystole
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What are 19mm high 3.5" hard disks called?

According to Wikipedia a normal 3.5" harddisk is 25.4mm high, but then there exist also a 19mm version, which I need for a HP ProLiant MicroServer. Looking at our resellers webshop I see the following options 1/3H SlimLine 1/2H 1/4H LFF When I…
Sandra
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How do services with large ingest rates install enough hard disks fast enough?

Amazon, Facebook and Google must take in TBs if not PBs per day, so does that mean they have people continuously installing new hard disks and cables in new racks in the same way you might build a regular server, or is there a different technology…
jl6
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df vs du. Is my disk really full?

Strange problem... Why i have full / partition used, but it's not really used? Fast info: xwing ~ # df -h Filesystem Size Used Avail Use% Mounted on rootfs 16G 15G 75M 100% / /dev/root 16G 15G 75M 100% / devtmpfs …
morsik
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Why HDD rotate at 7200 rpm?

I was wondering why hard drives rotate at these specific speed (5400,7200, ...) and not other values.
Guillaume Rose
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Disk usage per user in Linux / Unix

I need to find out how much disk space is being occupied by each user on the network. I am aware of df and du commands: I could list the entire filesystem and AWK the output, but I wonder if there is a more standard command. The output I am looking…
Escualo
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Why is ZFS so much slower than ext4 and btrfs?

Problem I recently installed a new disk and created a zpool on it: /# zpool create morez /dev/sdb After using it for a while, I noticed it was quite slow: /morez# fio --name rw --rw rw --size 10G read: IOPS=19.6k, BW=76.6MiB/s…
Snowball
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How can I tell if the server supports hot-swapping drives?

I recently purchased a used server (the type that fits into a rack, rather than a free-standing machine). One nice feature, is rather than having to open up the cover and unscrew the harddrives, this machine has eight "easy to use" caddies on the…
IQAndreas
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Is it bad to have a very full hard drive on a high traffic database server?

Running an Ubuntu server with MySQL for a high traffic production database server. Nothing else is running on the machine except the MySQL instance. We store daily database backups on the DB server, is there any performance hit or reason why we…
MikeN
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