a solid-state disk (SSD)

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3
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12 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 ...
0
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1answer
33 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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39 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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0answers
72 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 ...
3
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37 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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0answers
55 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 ...
1
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2answers
45 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 ...
0
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2answers
168 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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78 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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30 views

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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179 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
360 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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0answers
88 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 ...
0
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1answer
120 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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0answers
227 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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0answers
15 views

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. ...
2
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0answers
155 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
47 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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1answer
73 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
119 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 ...
7
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1answer
618 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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1answer
1k 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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0answers
26 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
52 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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2answers
71 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
38 views

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 ...
3
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2answers
404 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
43 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
107 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 ...
2
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1answer
265 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 ...
0
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1answer
92 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 ...
5
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1answer
329 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 ...
2
votes
1answer
268 views

Why does fstrim trim all of the free space on my mdraid mirror after a reboot? [duplicate]

I have a server with 2 SSDs: Model Family: Intel 520 Series SSDs Device Model: INTEL SSDSC2BW240A3F Firmware Version: 400i User Capacity: 240,057,409,536 bytes [240 GB] Sector Size: ...
3
votes
1answer
287 views

Can't enable TRIM on SSD

I can't enable TRIM on my newly-installed SSD. Ubuntu Server 12.04, Linux 3.11.0-15-generic. I turned TRIM on through discard setting in /etc/fstab. Also TRIM doesn't work with fstrim command. Here ...
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0answers
542 views

Possible issues with SSD SATA3 drive

While investigating the issue with my SATA3 SSD drive being recognized as SATA2 (for some reason had to change SATA ports to fix it) I noticed the following messages when I run: $ dmesg | grep ...
0
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1answer
262 views

Fedora doesn't boot after migration to new disk

I bought a new larger SSD and copied all data from the old SSD to the new one. On the SSD I have Ubuntu and Fedora, Ubuntu works normally after migration but Fedora boots into Emergency Mode. I have ...
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3answers
417 views

Mount a second ssd drive on centos - How can I figure out which is the unused drive?

I need to mount my secound ssd drive to /home2. I already created the folder /home2 - Now, how can i figure out which is the unused drive ? Is this /dev/sda or sdb ? What is the exactly thing i`ve to ...
0
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1answer
48 views

Two HDD installation [closed]

Is there any easy tutorial or guide how can I setup Debian (amd64 v. 7 + xface) on my server, but using this separation ? Separation: SSD (32GB) for system Normal HDD (1TB) for data like /var ...
3
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1answer
1k views

Using LVM with SSD and SATA drives

I saw in this question that it is possible to place both a SSD and a standard SATA hard drive into a single LVM volume group (VG). How does this affect performance? Is there a way to force the OS ...
0
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1answer
117 views

Installing Ubuntu on HDD and Windows on SSD

I am new to Linux. I have a 60GB SSD + 1TB HDD on my laptop. I want to know if I could keep Windows 8 on my SSD and install Ubuntu on HDD. Can GRUB detect both operating systems?
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110 views

Optimization for an SSD?

I am running Fedora 20 on a Laptop ( Lenovo Ideapad Yoga 2 Pro ) with an SSD. My filesystem is LVM with ext4 as the format option. I am now running Fedora as the only OS on the system with Legacy BIOS ...
4
votes
3answers
352 views

Hiding encryption key in unpartitioned free space of SSD

Anyone know what can happen if we use the unpartitioned space of an SSD hard drive to hide some data, what would happen? I have read that there are some SSD firmware using these blocks for recycling ...
1
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1answer
214 views

Is it possible to manually manage a Solid State Hybrid Drive?

I'm about to buy a new laptop which has a SSHD. It stands for Solid State Hybrid Drive, which means it has a big, regular HDD with a small, usually 8GB SSD to cache frequently accessed files. Now ...
1
vote
1answer
67 views

can /boot be on a different drive than grub or lilo?

I just got a vizio CN15-A5 laptop, which has both a 1TB HDD and a 32G SDD. I am going to use the SSD with dm-cache, however, I would to make /boot a partition on the SSD, and the laptop's BIOS doesn't ...
3
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1answer
558 views

SSD as a read cache for FREQUENTLY read data

I'm looking for ways to make use of an SSD to speed up my system. In “Linux equivalent to ReadyBoost?” (and the research that triggered for me) I've learned about bcache, dm-cache and EnhanceIO. All ...
4
votes
2answers
8k views

How to check the life left in SSD or the medium's wear level?

We all know that SSDs have a limited predetermined life span. How do I check in Linux what the current health status of an SSD is? Most Google search results would ask you to look up S.M.A.R.T. ...
3
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0answers
31 views

Determine whether TRIM commands are being sent [duplicate]

I've configured multiple SSDs in a RAID-0 array in AHCI mode. I'd like to determine whether TRIM commands are being sent to the disks. Is there a way to monitor these commands in the kernel somewhere? ...
0
votes
1answer
107 views

How to migrate files on Linux from HDD to SSD on a VDS

I upgraded my Dedicated Server and I was having problems finding my SSD. I found out how to MOUNT my SSD. I now have my 100 GB HDD and now 20 GB HDD. [root@server /]# mount /dev/xvdb1 /ssd ...
3
votes
3answers
325 views

Best way to benchmark different encryption solutions on my system

I want to compare different encryption solutions for encrypting my system, possibly different solutions for different parts of the system such as /usr or /home. In particular I look at dm-crypt ...
4
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2answers
4k views

Benchmark ssd on linux: How to measure the same things as crystaldiskmark does in windows

I want to benchmark a ssd (possibly with encrypted filesystems) and compare it to benchmarks done by crystaldiskmark on windows. So how can I measure approximately the same things as ...