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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.

2448 questions
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Disk Queue length of 30 in Azure App Service, that can't be right

We are having a battle with the Microsoft Azure support team. I hope the Serverfault community can chime in as the support team has messed us about before. Here is what is happening. As part of a larger SaaS service that we host on Azure, we have a…
Jeroen Ritmeijer
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Rubber rectangle with one adhesive side + server mount

I bought a new 2.5" hard drive that i put into a 1u server. I first screwed it into the hot swappable mount with screws then plugged it in. The hot swappable mount (image attached) came with a little rubber rectangle thing with one adhesive side.…
johhny B
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ReFS / storage spaces drive being dropped under heavy load

I have a Windows 10 workstation used within my business for things like image processing (Photoshop) and software development (Eclipse). It's an i7-2600K based computer, Gigabyte GA-B75M-D3H B75 motherboard, 16 GB RAM. OS is on Samsung 850 pro SSD,…
Tim
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Storage Space Write cache, and write speed

I have been working on my NAS that is using server 2012r2 with storage spaces. the drives are off the shelf 7200 rpm drives the drives are bitlocker encrypted the drives are in a 8 disk parity layout My question is this. Using SMB multichannel I…
Hunter Brelsford
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Extreme ZFS slowdowns after several months

I've got a general-purpose server, providing mail, DNS, web, databases, and some other services for a number of users. It's got a Xeon E3-1275 at 3.40 GHz, 16 GB ECC RAM. Running Linux kernel 4.2.3, with ZFS-on-Linux 0.6.5.3. The disk layout is 2x…
squidpickles
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Configuring SQL for optimal performance... SSD or HDD?

Does anyone know of any comparisons that show how SSDs compare to HDDs for performance in a SQL environment? I'm trying to understand what type of performance benefit might be gained by moving to SSD.
spoon16
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Determine if C drive has 2 GB of free disk space

I am trying to determine if a target pc has atleast 2 GB of free space. Here is what I have so far: @echo off for /f "usebackq delims== tokens=2" %%x in (`wmic logicaldisk where "DeviceID='C:'" get FreeSpace /format:value`) do set…
Sean Beegle
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Is disk serial readable from supermicro chassis?

We are working with a hosting company for managing our dedicated servers. We asked for a replacement disk on one of the servers by providing the serial number. They took out 2 other disks instead and put them back in. When we asked for an…
refik
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How to keep subtree removal (`rm -rf`) from starving other processes for Disk I/O?

We have a very large (multi-GB) Nginx cache directory for a busy site, which we occasionally need to clear all at once. I've solved this in the past by moving the cache folder to a new path, making a new cache folder at the old path, and then rm…
David Eyk
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iotop and iostat disagree

I'm trying to understand what's going on with my server's disks. It's running Ubuntu 12.04LTS and I'm used to using iostat to know when the disk is the bottleneck. But iostat -xd looks to me like the disk is pretty idle: Linux 3.2.0-41-generic…
Leopd
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Is it wise to use SSHDs (Solid state hybrid drives) on a server?

I have a bunch of servers with very heavy I/O that currently use SATA3/SAS drives, but do suffer from I/O wait on the SATA drives, and I have just been alerted to the existence of SSHDs which cost the same for 1TB as the 1TB SATA drives that we…
Seb
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What causes hard disk failures?

What causes hard disk failures in general. I would like to know the common causes and how to prevent such incidence.
SZayat
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Best Nagios plugin for SMARTd / smartmontools?

I've installed SMARTd / smartmontools on a server and I want to monitor it over Nagios. However on Monitoring Exchange, I see several…
Amandasaurus
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DegradedArray event on /dev/md1

This morning I got this message: This is an automatically generated mail message from mdadm running on A DegradedArray event had been detected on md device /dev/md1. Faithfully yours, etc. P.S. The /proc/mdstat file currently contains the…
user1821484
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disk space keeps filling up on EC2 instance with no apperent files/directories

How come os shows 6.5G used but I see only 3.6G in files/directories? Running as root on an Amazon Linux AMI (seems like Centos), lots of free memory available, no swapping going on, no apparent file descriptors issue. The only thing I can think of…
sasher
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