Questions tagged [hard-drive]

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

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Mysterious, intermittent Read I/O on Ubuntu 18.04 based EC2 server - iotop shows no disk reads

I have an EC2 server based on Ubuntu 18.04. With CloudWatch detailed monitoring enabled I'm seeing spikes of Disk Read Operations that last less than 1 minute (shown as 1-minute spikes on the graph) ...
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Transferring data from netbook hard drive to laptop

Recently, I got a new hp laptop (model: hp laptop 15-da1xxx) after my neo netbook crashed and couldn't display anything on its screen. Unfortunately, all the important files and videos from the ...
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Process blocking or disk corruption? Very high load + wait times, but low CPU/memory use

I am using a vServer that is suddenly experiencing very high wait times (10/20/30 seconds) or even timeouts on basic requests since yesterday after being in use for over a year without any problems. ...
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Why are concurrent downloads faster

Many download managers like this, this and this support downloading a file over multiple parallel connections, one per thread. The concept is that each connection will download one part of the file ...
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Drive failing SMART self-test, but rewriting the affected server does not reallocate it

I have a drive (a Seagate Momentus 7200.4 2.5" 7200 rpm drive of 500 GB, device model ST9500420AS) which is behaving strangely. I know the answer is probably just "throw it away" but I'm curious to ...
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37 views

Huge MFT and slow performance

I have a Windows Server 2012 R2 with huge MFT and slow performance when listing file in folder. Filesystem is about 350.000 files but in past many millions file was created and delete with crap Backup ...
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fsck on disk while Linux machine is up with runlevel N 5

we have linux machine , and we did the disk repair as the following umount /grid/sde fsck.ext4 /dev/sde e2fsck 1.42.9 (28-Dec-2013) /dev/sde: clean, 103867/1310720 files, 4725204/5242880 blocks this ...
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22 views

Possible to run a G-Technology G-SPEED Q with only 1x hard drive installed?

I picked up an old G-Technology G-SPEED Q that had had all of it's internal drives removed. It previously held 4x 2TB hard drives that it could run RAID 0 or 5 accessible via USB 2.0, Firewire 800 and ...
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How to perform hard disk repair from terminal

I have a corrupted hdd and I want to fix the issues. The problem is that during this situation I can not access my PCs in my office so I am ssh them from my home PC, and so I wonder if there is any ...
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38 views

Very Low IOPs on Array of 16x 15K SAS Drives

I'm having issues with one of our servers that is running 16x 900GB 15K SAS drives in a RAID 1+0 Array on a PERC H710P, under normal load its doing ~450 IOPs (almost all writes) and has a backlog of ~...
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smartctl selftest read failure an 4 drives (Raid6) at the same LBA

I just repurposed 4 drives that where out of use for a long time and installed arch linux (raw discs -> mdadm -> dmcrypt -> LVM -> ext4) on them. While creating the LVM i got "ATA read errors" for ...
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Importing a Raid1 single disk and use it as a drive

I had an Intel raid1 disc array (3tb each) and had to rebuild the system. Now I have both disks but really don't need raid anymore as I'm just planning on using backblaze to backup my data on the PC. ...
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103 views

HDD spins up spuriously for no reason

I have four HDDs in my NAS. Three (Western Digital, all the same model) are put in standby mode (spin down) by hd-idle and they stay in standby until I use them. The reason I use hd-idle and not the ...
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17 views

Is it possible to join 2 disks together for daily increased files saving?

Now on my server, we have 20GB disk size. We use it for daily backup with this path: /var/lib/backup. Filesystem is on /vda. But it's small. It will be used out in future soon. So we added another ...
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75 views

Testing faulty disk

I have a degraded RAID-1 setup and I'm trying to troubleshoot the problem whether it's completely dead (and need to send the drive back to the vendor) or it can be brought back. So I ran smartctl: ...
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How to map a UUID directly to both a device name (e.g. /dev/sda1) AND a mount point (e.g. /mnt/home2)?

I know how to map /etc/fstab to the mount point with the device name: /dev/sdb1 /mnt/home2 ext4 usrjquota=quota.user,jqfmt=vfsv0 0 0 This practice is however highly ...
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24 views

smartctl harddisk check doesn't show Attribute

today i install on my linux server the app smartmontools, after testing my hardrive (raid1) he doesn't show the Attribute. After the command smartctl -a /dev/nvme0n1 ,i get the result without ...
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60 views

Is my server drive on SATA2 or SATA3 based on this output?

smartctl output: # smartctl -a /dev/sda | grep SATA SATA Version is: SATA 3.1, 6.0 Gb/s (current: 3.0 Gb/s) dmesg output (empty): # dmesg | grep SATA hdparm output: # hdparm -I /dev/sda | grep ...
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lmd(linux malware detect) maldet -m --monitor, impact on performance [duplicate]

Maybe there are other places that talk about this, but I didn't found them. I want to know if someone have measured the impact that has having the maldet --monitor activated on the computer. I'm ...
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23 views

Ubuntu Not Detecting Free Space In Root Partition

My server has a 40GB HDD and runs Ubuntu 18.04. The output for the command: sudo lsblk -o NAME,FSTYPE,SIZE,MOUNTPOINT,LABEL returns: NAME FSTYPE SIZE MOUNTPOINT LABEL loop0 squashfs 91....
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39 views

nginx + php-fpm extremely high amounts of data written to disk

We are facing a problem with extremely high data writes to disk and huge amounts of traffic over loopback interface. Environment: Debian 10.3 (4.19.0.8) - virtualized in hyper-v nginx/1.14.2 php-fpm ...
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58 views

qemu-system_x86-64 can you add a physical hard disk to a virtual machine without being root

As it is on the title I want to add a physical partition to my VM without having root privilege. Is it possible from Linux and how should I do this by using only qemu-system_x86-64 ??
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PERC 5/i Incompatible with Toshiba SAS Drives

I have a PowerEdge 2950 with 2x Dell 146GB SAS Drives. (ST9146802SS, Manufactured by Seagate) I recently purchased 4 600GB Toshiba SAS drives (AL13SXB600N) for a NAS array, but when I inserted them ...
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Whats the meaning of the grid with white dots in the back of a hard drive?

I've noticed that some of my hard-drives have a grid with the white dots in them. Some hard drives do have the grid, some of them don't. What is the meaning of the grid? Additionally, what do those ...
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34 views

“Hot plug replacement too small” although disk is of same size

On one of our servers, a disk failed that was part of a RAID 5. I replaced that disk with one of identical size. However, the RAID does not start to rebuild. If I check the status of the disk with ...
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50 views

LUKS encryption on which layer?

Option1: Linux Partition -> LUKS -> LVM Option2: Linux Partition -> LVM -> LUKS Which stack is better from system load aspects? Background: On my Linux server (CPU AMD Opteron 6338P, LSI 3ware SAS /...
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71 views

Can I configure RAID 1 with production server running?

I am facing issue configuring RAID 1 with currently running production server (Ubuntu 18.04 LTS). Currently my configuration is sda 8:0 0 1.8T 0 disk ├─sda1 8:1 0 1M 0 part └─...
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30 views

Mapped Harddrive, Bitlocker? [closed]

All the available letters to use for harddrive, i used up. So for my new harddrive, i used mapping. So i have mapped my new harddrive to a folder. My question is, is it possible to still get ...
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66 views

Is it safe to have virtual memory in servers?

I'm not sure if it's safe to have virtual memory (pagefile.sys) in servers? Safe in the sense of: Would it affect the data in the cache that is being handled by RAM? Does it conflict if it will be ...
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SAS drives not recognized in Netapp DS4486

To start off with, here are the relevant hardware specs: Dell R710 w/ Windows Server 2016 Dell PERC H200e Dell PERC H810 Dell PowerVault MD1200 w/ 03DJRJ controllers NetApp DS4486 w/ IOM6 ...
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460 views

Ceph hardware sizing calculator

I would like to calculate the Hardware sizing for a ceph cluster. There are so few references to the sizing, that I try to get these details here in the community. E.g. what shall i have depending on ...
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117 views

What is the risk of RAID 0 for a *single* disk versus no RAID on that disk?

I have a server that I'm having trouble with getting the drive to show up without using RAID. However, that's different question. This question is about the problems running a RAID 0 on a root drive ...
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49 views

SSD does not show up in server without RAID

I have a server Supermicro SuperServer 6017R-72RFTP with the motherboard X9DRW-7TPF. I have a 1TB Samsung SSD. The SSD shows up when the server boots and in the BIOS, but when I go to install an OS it ...
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206 views

What is Split IO?

I'm trying to understand the meaning of split io/sec counter for physical disk in Windows Performance monitor and don't quite get the reason why the single IO operation might be split into several. ...
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1answer
35 views

Bash hangs when trying to create file or issue ls on raid mount point

I have /dev/sdb1 mounted to /media/zm_recordings. I'm using an LSI 9211-4i RAID controller with two 500GB disks in RAID 1. Megaraid manager shows the disks and volumes as healthy. (Screenshot at ...
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138 views

GCP: Docker taking up too much of disk space (47%, 69 GB). How to free up disk space?

Out of the 148 GB disk space of my Compute Engine Instance, /home folder is taking up only 55 GB whereas /var/lib/docker/containers is taking up a total of 69 GB, which is too much of disk space usage ...
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1answer
67 views

Grow an mdadm RAID5 array with fewer, larger disks

I have a linux software RAID 5 array, made up of 5 x 3 TB drives, giving me roughly 12 TB in total. I want to replace the disks with newer 8 TB drives, but since these are still quite expensive, I ...
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1answer
53 views

Should I turn indexing of a hard drive on or off on Windows Server 2019 with a HDD with millions of files on it?

Server is running Windows Server 2019 with IIS running. I have a standard spindle enterprise 8TB HHD with about 30 million JPEG image files on it. The amount of images grows daily. Each file is less ...
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103 views

How to mount a RAID array on a Linux server if it does not appear to be listed?

I am helping to administer two CentOS 5 servers, on the "user" side of things. A RAID 1 array and a separate single hard drive were recently added by IT support. According to the IT support, both of ...
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56 views

How do i get EMC hard drives to work in a Dell Poweredge R510?

Recently I have acquired a Dell Poweredge R510 12 bay LFF 2U server without any drives. I made an impulse buy for 12x 3TB hard drives because they were a great deal and i didn't think much in the way ...
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1answer
66 views

Refresh disks on live system without rebooting

I have 4 drives in a server. This is a live server. One of these drives I replaced with a different drive and changed the mount point for the new drive so as to avoid confusion. After completing the ...
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773 views

'Foreign' state for brand new disk in Dell R730

Trying to install additional drives into my R730 Dell Poweredge (none have failed, just need more space) Inserted the disks and they all show as status 'Foreign' and the only option available is '...
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1answer
20 views

Possible to extend /DEV/SDB1 on Centos machine without downtime/data loss?

on CentOS6 I would like to extend /dev/sdb1 to get more free space: df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_www-lv_root 18G 2.9G 14G 18% ...
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2answers
72 views

HP Proliant DL180 G6 HHD failure and replacement

One of the HP HDD in our HP Proliant DL180 G6 had failed, I've replaced the failed HDD with a standard 1 TB Seagate HDD, the Array controller won't start rebuilding on a Seagate, I had the new Seagate ...
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73 views

Identify the Current Bottleneck in my PostgreSQL Server

This is my first time running a database server that is under some real (non-synthetic) workload and require your help in identifying the current bottleneck. Question: Is it the CPU, RAM, Disk IO? ...
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1answer
39 views

How can I connect an SAS drive to a server mobo without native SAS port

Here is my motherboard https://www.supermicro.com/products/motherboard/Xeon/C600/X9DRD-iF.cfm I don't see SAS listed which is why it's not reading, or because it isn't using an SAS cable. SATA is ...
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1answer
122 views

What's the difference between 10k/15k SAS HDDs and SATA SSDs?

What is the rule of thumb in performance characteristics and differences between 10k / 15k revolutions per minute (RPM) Serial Attached Storage (SAS) hard disc drives (HDDs), versus Serial ATA (SATA) ...
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76 views

UDMA CRC SMART Reporting, Alternative Software/logs for Diag

* Update * As it turns out the human readable portion of SMART reporting numbers is pretty useless for the UDMA CRC errors and you just have to track the RAW value. After flushing through over a dozen ...
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1answer
95 views

RAID 5 disk failure?

I know theoretically how RAID 5 works. In one of my system one disk failure happened on a system with RAID 5. It will take a day to get it replaced. I understand once disk is replace, data will be ...
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1answer
29 views

/boot df -h and ls -lh do not match

Redhat Centos7 I've tried searching the internet for far too long to find a solution. my /boot partition has an issue. I can't find what's taking up space. this is my df -h it shows -boot taking ...

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