a solid-state disk (SSD)

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ssd caching in loop device on btrfs

I have an ssd and 2TB hard disk. The ssd is used for the root filesystem which uses only around 20G of the 120G available. Is there a way to use an image/loop on the root filesystem (btrfs) as a cache ...
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21 views

How to install CentOS 6.6 linux on an OCZ RevoDrive3 X2 PCI SSD

This took me a week, so here's the problem, and solution. From CentOS 6.5 onwards, the driver mvsas.ko recognizes the OCZ SSD... wrongly. It shows up as 4 small slow SSDs, instead of one big fast ...
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89 views

SSD installed, but shows as HDD in command output

Strange issue here. I have a 480GB SSD drive installed in this server. I installed it myself. I see it, it's there. But, I'm getting an incorrect output on a typically used command to determine if ...
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1answer
32 views

how to fetch SMART attributes in SSD?

I have a SAS SSD and I want to know few things like "Perc_Lifetime_Remain", etc. In the exisiting SATA SSD drive, we are fetching these info by using smartctl tool ("smartctl -A diskname"). But the ...
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1answer
26 views

SWAP write protection on SSD

When using SWAP on an SSD, does the filesystem offer any write-cycle protection? i.e. randomizing or otherwise managing writes to avoid "flash wear-out" since modern SSDs are generally rated in the ...
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2answers
101 views

Can't mount second hard drive on CentOS 6.6 - Duplicate VG name

Yesterday I add a SSD to my PC configuration and I make on it a fresh installation. At the moment of installation I replace my old HDD and there was only the SSD. When the installation finish I make a ...
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61 views

Repeated Ext4-fs error with comm psad: invalid block. Does it mean the SSD is dying?

Configuration : Debian Jessie with SSD. /dev/sda1 is root filesystem, /dev/sda6 is home filesystem. Errors occurs only on /dev/sda1. For the third time, I've got software errors because the root ...
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1answer
33 views

Problems with secondary hdd in grub

I had some problems installing Linux mint and or any other Linux distribution in combination with Windows. When I booted my machine it would hang before the grub bootloader showed up. Now i have some ...
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49 views

New SSD only mounts after issuing blkid command. [Ubuntu 14.04]

I have a new Intel SSD Pro 2500 installed on a SATA3 port as a secondary drive. It is formatted as a primary ext4 partition. My fstab line is : UUID=1e33881a-d6cf-4933-be70-0aa837641af6 /mnt/ssd ...
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1answer
79 views

Will SSD swap improve performance?

I am wondering if i have only 4GB ram and somehow(virtualbox,browser) isn't enough and i cannot proceed to upgrade(due to ultrabook and soldered memory) will swap held in SSD help the overall ...
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1answer
32 views

Change Linux Bcache device type

I have accidentally configured my SSD as a backing device instead of a caching device. Simply trying either one of the following: sudo make-bcache -C /dev/sdb1 sudo make-bcache -C /dev/sdb Gives ...
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1answer
25 views

Can I Wipe My SSD from within the Drive Itself?

I have a 240 GB ssd that contains my entire system (distro and kernel). I want to wipe it and start fresh following these instructions: https://wiki.archlinux.org/index.php/SSD_memory_cell_clearing ...
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1answer
75 views

dd'ing SDD, decreasing write speed

My hard drive is a SanDisk SSD. The drive is new. I've booted into ArchLinux Live System, with the intention of preparing the hard drive for full disk encryption. I've noticed a significant drop of ...
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43 views

HW RAID10 without TRIM support with SSD

Recently we purchased new server for Database with 1TB x 4 SSD in Hardware RAID 10, but my Hardward RAID doesn't support TRIM so you think it is going to be big deal? Is there anyway i can do ...
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118 views

Broken iSSD on motherboard freezes Ubuntu 14.04

I have an Asus UX32VD laptop which has a primary harddrive where the OS is installed and a small iSSD of 24GB on the motherboard which is not used for anything. I'm running Ubuntu 14.04 and Windows 7 ...
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282 views

Grub environment block on Centos 7 with efi?

How do I modify the default or next-boot boot entry for the next reboot on Centos 7? I need to switch back and forth between kernels frequently. The machine is in a different room, so it is most ...
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1answer
107 views

Installing Linux by copying?

I've been trying to install a few linux distros on a machine with hybrid strorage - /dev/sda is an HDD and /dev/sdb is an SSD , with /boot, /swap and /root on the SSD and /home possibly on the SDD or ...
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1answer
129 views

SSD dedicated to swap-only fails on Debian or Ubuntu

It did not happen to me yet, but if I dedicate a single SSD (non-RAID) to swap-ONLY and the server system is using it to full capacity - what happens next? How am I to recover, assuming I have an ...
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70 views

Discover what is cached by dm-cache

I am using dm-cache successfully for quite a while now. Now I would like to know which files are being currently in the cache. I understand that dm-cache works with blocks, not files, but since there ...
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1answer
91 views

SSD not persistent

My SSD forgets data and falls back to a previous version, I've raised this issue on the Arch forum here. Let's say I install an application and all is well. Then after a reboot it is gone, ...
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123 views

Intermittent, temporary freezing

I just got na SSD for my desktop, and decided I'd install Linux on it, for a change from Windows. The problem is, I've tried Ubuntu 14.04 and Fedora 20, and on both, in the install environment and ...
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179 views

BTRFS Raid1 on SD card and HDD

I have the / partition on a btrfs SD card /dev/mmcblk0p2. /boot is on vfat /dev/mmcblk0p1). It's a Raspberry Pi running Arch Linux and its fstab looks like so: /dev/mmcblk0p2 / btrfs ...
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87 views

adding encrypted /home in LVM/LUKS

I installed a new (debian) system to an SSD device. After standard install I want to mount /home on the internal HDD. To be able to ask the question, some details: On install I (manually) generated ...
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140 views

Arch/OSX - fstab options for shared /home (HFS+) on SSD

I've got an Arch and OS X install sharing an HFS+ (non-journaled) /home partition. My Arch side seems to have issues with the partition. In particular, deleting multiple files causes the drive to ...
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2answers
166 views

Spanning RAID over SSD and Mechanical HD

Currently I have my root (/) directory on my ssd, and my home directory on my mechanical drive. Wanting to utilize more of the ssd and hopefully get a speed benefit, I was considering spanning across ...
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630 views

How to check SSD disk for errors from a Live CD?

Debian on SSD. How to check SSD disk for errors from a Live CD? Additionally, to save results to a txt file. Partitions are sdb1 /boot ext2 sdb2 root ext4 sdb3 swap Should I unmount partitions ...
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130 views

Dualboot elementaryOS & Windows 8.1 on SSD with personal files on HDD?

When I create my gaming PC I plan to dualboot Windows 8.1 with elementaryOS and my programs on an SSD. However is it possible to place my data on a HDD for both to access?
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Should I use the discard flag when configuring the filesystem to be installed over the partitions on my SSHD?

I've recently bought a laptop with an SSHD. My guess is that most SSHDs are self-optimised, so the disk itself will handle wear-levelling issues, and I won't need to add the "discard" flag when ...
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363 views

Optimizing bcache

I have 3 HDD and 1 SSD, I have successfully mounted all drives to bcache. pavs@VAS:~$ df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 132G 35G 90G 28% / none ...
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1answer
1k views

How to install Linux Mint 17 on SSD and have Home on HDD

I have Sony Vaio VGN-NW23NE Laptop and I'm using Linux Mint as my Operating System for about two years, I've currently Qiana. I bought a new 120 GB SSD to speed up my Laptop, but I'm confused about ...
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203 views

How to run SSD trim fstrim on btrfs when mounted multiple subvolumes?

I am using btrfs and have mounted several subvolumes (but not btrfs root). It resides on SSD partition, so I would like to use fstrim. Should I call fstrim on each mountpoint (corresponding with ...
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1answer
270 views

Wrong mount point for internal SSD

I am having a problem with mounting an internal SSD. For some reason The mounting point is chosen as /media/user/Data instead of, as specified in /etc/fstab, /mnt/Data. The according line in ...
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321 views

SSD Crash Randomly on Linux Mint 17

I'm running Mint (17 Qiana 64bit) on a fresh install on a new laptop (Dell N5110) with a new Crucial MX100 SSD and twice now the whole system has frozen up. If I switch to a text terminal (as in ...
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Is there a distribution with an installer that can automatically do LVM over LUKS with everything aligned as needed?

http://www.void.gr/kargig/blog/2012/01/11/linux-ssd-partition-alignment-tips/ talks about aligning SSD partitions and LVM physical volumes. ...
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229 views

/dev/sda not appearing after secure erase

I decided to wipe my SSD with a secure erase before installing Arch Linux, since the Arch wiki said that it would improve performance. I followed the instructions listed on the wiki, but now when I ...
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1answer
87 views

How to detect exact spec of my disk on a cloud server?

I've already read a question about whether your disk is SSD or HDD. When I issued the below command I've got surprised: cat /sys/block/vda/queue/rotational The output was 1. The question is why ...
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111 views

Solid State drive vs. traditional hard disk in a virtual server environment

I am currently considering upgrading my virtual-hosting plan because of very bad write performance (mostly writing to a MySQL database, but I notice it also when compiling a program or copying files - ...
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2answers
296 views

I recently cloned my drive, while booting I have to wait at this screen which has a number of error messages

Once booted the computer works fine (debian 7 sid), no other issues. I just have to wait at this screen for around 3 minutes, unfortunate since I have an SSD. Are these error messages causing the ...
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1answer
3k views

What filesystem should I choose for an SSD? [duplicate]

I am going to set up a new Linux system on the SSD drive. Does the filesystem choice make a difference for them? Should I go with the default ext4, maybe try XFS, or does it just not matter?
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6k views

Difference between 'sync' and 'async' mount options

What is the difference between sync and async mount options from the end-user point of view? Is file system mounted with one of these options works faster than if mounted with another one? Which ...
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43 views

PCI-e SSD - Not visible to sysstat's iostat or sar

I am attempting to get basic statistics during test runs on a server with a PCI-e attached SSD that is mounted on /dev/rssda1, however sar and other sysstat either do not log, or in the case of iostat ...
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1answer
85 views

Could I set flag “barrier=0” when using SSD?

I'm using ext4 filesystem in SSD,when mounting SSD,could I use flag "barrier=0"? I knew this flag is safe for BBU(battery backup unit),but is it safe for SSD?
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90 views

Small build-in ssd in notebook can install linux?

I bought a samsung laptop series 5. There are a 24gb ssd and normal hard disk. I need to install linux ubuntu on this notebook. Can I just install the ubuntu on the build-in 24gb ssd? If not, how can ...
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0answers
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SSD seems full, but file system says otherwise [duplicate]

I'm running CentOS and have a 100GB Micron RealSSD P300. It appears that the drive is almost full, as noted by running df: Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda3 ...
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2answers
952 views

bcache on md or md on bcache

bcache allows one or more fast disk drives such as flash-based solid state drives (SSDs) to act as a cache for one or more slower hard disk drives. If I understand correctly, an SSD* could be ...
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1answer
56 views

How to discard/TRIM a range in an open file ?

For an SSD, I can open the row device and discard a range of pages using ioctl() with BLKDISCARD command. My question is for an open file, how to discard a range of data? and Is that depends on the ...
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3answers
172 views

Low level disk i/o on linux

Can a user level program do page level or block level I/O on SSDs? I've looked at disk devices, but am unsure if they provide this as they work only if the partition has a file system. UPDATE #1 I ...
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1answer
576 views

btrfs on SD card, what does “Btrfs detected SSD devices, enabling SSD mode” mean exactly?

I'm experimenting with using btrfs on my Debian Linux armhf system. The rfs is on a micro SD card. On bootup I get the message "Btrfs detected SSD devices, enabling SSD mode". What features does ...
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1answer
123 views

Replace USB stick boot device with SSD

I have an OpenElec based HTPC which boots from a USB stick. I would like to replace this with an SSD drive. What is the best way of copying the USB image to the SSD. Is this something that dd could do ...
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1answer
609 views

How to use an SSD for caching, so my hard disks can spin down?

I've got a file server with a bunch of disks running together in a BTRFS pool and want to add an SSD for caching. I'm not mainly after speeding up things, but want to catch the regular small accesses ...