Questions tagged [ssd]

Solid-state drive refers to a data storage device that uses solid-state memory to store its persistent data.

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Running SQL from memory faster than SSD?

Recently we have been having problems with our oracle database locking up on 1 query that we know so far. I will give a break down of what is happen however really doesn't have too much to do with my ...
Anthony Fornito's user avatar
12 votes
1 answer
332 views

ssd firmware, linux: updating large batch of drives

I was recently hit with a fatal firmware bug that affected dozens of Crucial SSDs deployed in my datacenter. Many of the affected machines use LSI or other proprietary SAS controllers, which Crucial's ...
wryfi's user avatar
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11 votes
6 answers
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SSD for swap on Ubuntu server

Currently I am reading SSD reviews and I wonder how much exactly I will benefit if I move the 24 GB swap from 7200rpm HDD to SSD. Does anyone implemented swap space on SSD? Is this generally good idea?...
grs's user avatar
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11 votes
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SSD (Intel 530) read/write speed very slow with RAID 10

Explanation: We have a Server: Model: HP ProLiant DL160 G6 4 x 240GB SSD (RAID-10) 72GB DDR3 RAM 2 x L5639 HP P410 RAID Controller (256MB, V6.40, Rom version: 8.40.41.00) SSD drives are 4 brand new ...
11 votes
2 answers
19k views

does adding heaps of drives to a raid 0 increase performance?

does adding heaps of drives to a raid 0 increase performance? i know that two drives in a striped raid will usually be faster than a single drive but will i notice a difference in performance between ...
Peter Cullen's user avatar
11 votes
4 answers
9k views

Does putting the XFS log on an SSD significantly improve performance?

I have a five disk array running XFS in RAID5, and I would like to improve it's performance. I have seen some hints that putting the log onto a separate device can help, does putting the log onto an ...
Paul Wagland's user avatar
11 votes
4 answers
5k views

SSD TRIM (discard) problems with ext4 on Crucial C300 SSDs with CentOS 5.5

Playing around with using a modern kernel (2.6.37 currently) on an older OS (CentOS 5.5) so we can get TRIM (discard) working on our SSDs (Crucial C300s). The most recent hdparm (9.37) concurs that ...
Don MacAskill's user avatar
11 votes
3 answers
4k views

Background discard on swap partitions on Linux + SSD

Problem I want to enable background TRIM operations on a swap partition within a SSD disk on Linux. According to several articles, e.g. this one, the kernel detects this configuration and ...
santisaez's user avatar
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10 votes
4 answers
28k views

What effects do magnets have on HDDs and SSDs? [closed]

What do magnets do to hard disk drives and solid state drives upon contact?
Zack Zatkin-Gold's user avatar
10 votes
2 answers
6k views

ZFS and cache devices

I'm going to add a SSD drives to my ZFS storages as a cache. Anyone has any experience with this? What if cache device dies, will the any data be affected?
disserman's user avatar
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Poor iSCSI performance with SSD disks and 10 Gbe network

iSCSI Target Ubuntu 14.04 (Trusty Tahr) with 16 GB RAM and 16 core CPU as LVM backed iSCSI target using three Samsung SSD disks, each capable of doing 65k IOPS using an LSI 6 Gbit/s ...
Kevin Parker's user avatar
10 votes
3 answers
10k views

System drive on SSD; pagefile to its own drive?

I am using an Intel X25-E SSD for the system drive of a Windows Server 2008 R2 server with 16 GB RAM. Would it be good practice to move the pagefile to its own drive? If so, for the pagefile drive, ...
sejong's user avatar
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10 votes
3 answers
8k views

ZFS - Impact of L2ARC cache device failure (Nexenta)

I have an HP ProLiant DL380 G7 server running as a NexentaStor storage unit. The server has 36GB RAM, 2 LSI 9211-8i SAS controllers (no SAS expanders), 2 SAS system drives, 12 SAS data drives, a hot-...
ewwhite's user avatar
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10 votes
3 answers
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Root Device on SSD instance types. SSD vs EBS confusion

I have an AMI that was originally created from a t1.micro linux. The "Root Device Type" of this AMI is EBS (8 GB) and my web application software is "baked" into this root volume. Now I would like to ...
user183744's user avatar
10 votes
2 answers
4k views

Are bcache and/or dm-cache considered stable for production in 2016?

I would like to use linux SSD caching (dm-cache or bcache) with Debian Jessie production servers. (kernel 3.16) My question: Are dm-cache and bcache modules reliables in linux 3.16 ? Do I need to ...
sligor's user avatar
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9 votes
2 answers
6k views

How do I verify that my hosting provider gave me SSDs?

I searched and found 2 options, none of which I'm confident provided me the answer. 1: cat /sys/block/sda/queue/rotational This output '1' to stdout. What does this mean? 2: lshw -class disc but ...
Amir Bar's user avatar
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9 votes
5 answers
3k views

Can we upgrade Dell's basic Server R240 (which still uses HDD 7200RPM) to an SSD?

Today I was shopping for the most basic dell rack server which is the R240. Ironically, they are still using HDD 7200 RPM, with no option for SSD in their selection; and we're approaching 2020! ...
user1034912's user avatar
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9 votes
3 answers
32k views

Why do servers have SAS instead of SSDs? [closed]

I was wondering why do servers still come with SAS disks instead of SSD disks? I know that SAS are faster than normal hard drives but they are still much slower than SSDs. I think they are more ...
katie's user avatar
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9 votes
5 answers
5k views

Putting Oracle redo logs on DRAM SSD for a heavy write database?

I have a Sun M4000 connected to an EMC CX4-120 array with a write-heavy database. Writes peak at around 1200 IO/s and 12MB/s. According to EMC, I am saturating the write cache on the EMC array. I ...
rmeden's user avatar
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9 votes
4 answers
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SAN with a few SSD drives, or lots of old fashioned HDDs?

My company is trying to figure out what type of SAN to purchase. This is specifically for database servers that are becoming IO constrained (storage is DAS right now, but we're hitting the limit of a ...
Beep beep's user avatar
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9 votes
2 answers
9k views

Why do sequential writes have better performance than random writes on SSDs?

An LBA (logical block addresses) is a mapping table implemented in the FTL to match between logical and physical pages/blocks in SSDs, my guess is that most SSDs (at least when they are empty) keeps ...
SamTh3D3v's user avatar
  • 283
9 votes
3 answers
4k views

How do SSD fail near end of life?

Let's say a MLC SSD has lasted a very long time and the first cell has hit its last erase cycle and refuses to erase. What happens after that? Does the controller detect that as a bad block and ...
Pyrolistical's user avatar
9 votes
4 answers
5k views

Using SSD as disk cache

Is there software for Linux to use an SSD as disk cache? I believe that Sun does something like this with ZFS, though not sure. A quick search provides nothing suitable. The goal would be to put ...
casualcoder's user avatar
9 votes
2 answers
5k views

S.M.A.R.T. lifetime hours resetting to zero

I use S.M.A.R.T. selftest to test all of my hard drives and SSDs. I run a short test daily and a long test monthly. One of my SSD is showing odd behavior in that the lifetime hours seem to reset back ...
MERM's user avatar
  • 240
9 votes
3 answers
12k views

Causes of sudden massive filesystem damage? ("root inode is not a directory") [closed]

I have a laptop running Maverick (very happily until yesterday), with a Patriot Torx SSD; LUKS encryption of the whole partition; one lvm physical volume on top of that; then home and root in ext4 ...
poolie's user avatar
  • 1,175
9 votes
5 answers
6k views

Squid or Other HTTP Caches with SSD Cache Store?

I'm contemplating setting up a squid (or possibly varnish) cache on a system with SSD drives. The obvious benefit is that these systems have great READ speeds and I expect my hit ratios to be fairly ...
Joel K's user avatar
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9 votes
5 answers
9k views

SSD + LUKS performance comparison?

Our laptops and portable drives must be LUKS encrypted. LUKS doesn't really seem to cause much performance loss on normal laptop hard drives (7200RPM) for us. With the crazy data rates you get with ...
darron's user avatar
  • 463
9 votes
5 answers
1k views

SQL Server 2K/2K5/2K8 and Solid State Disks: Specific Optimizations?

Is anybody here running SQL Server on solid-state drives? Have you found any specific optimization tips? I'm specifically interested in ways to reduce the frequency with which SQL Server performs ...
John Rose's user avatar
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8 votes
10 answers
22k views

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's user avatar
  • 245
8 votes
3 answers
5k views

Tmpfs vs NVME SSDs from performance POV [duplicate]

I have a script that creates large temporary files. I'm inclined to use tmpfs for this, however I did a quick search for tmpfs performance and found this which reports speed as about 2GiB/s. Modern ...
Peeyush Kushwaha's user avatar
8 votes
4 answers
18k views

HP D2700 enclosure and SSDs. Will any SSD work?

I've got an HP D2700 enclosure that I'm looking to shove some 2.5" SSD drives in. Looking at the prices of HP's SSD drives vs something like an Intel 710 and even something less 'enterprisey', there's ...
growse's user avatar
  • 8,050
8 votes
4 answers
23k views

Samsung 840 Pro SSDs in a Dell R720

We have a MySQL database server running on an Dell PowerEdge R720 (PERC H710 Mini RAID controller) ( (Ubuntu 12.04). We're considering upgrading the 2 x 146GB 15k SAS drives to Samsung 840 Pro SSDs. ...
BT643's user avatar
  • 571
8 votes
3 answers
13k views

Qemu TRIM and discard on a physical SSD device

I am running Windows 7 in a Qemu/KVM with a passed through GPU which I use for work-related stuff. I recently got fed up by it's unprecedented slowness due to it running off a mechanical drive, so I ...
nohupper's user avatar
8 votes
1 answer
1k views

Offline uncorrectable sectors in SSDs being used for ZFS L2ARC?

I have two enterprise-grade SSDs that I've been using for L2ARC in an OpenZFS pool for a few years. Workflow during this time has been fairly heavy, with lots of reads and writes, serving up video to ...
user260467's user avatar
8 votes
2 answers
16k views

Smart Array P410i with SATA SSD drives unstable

I have a HP Proliant DL380 G7 with said array controller and 6 INTEL SSDSC2KW4's, set up in Raid 5. Normally I have never had problems with SATA drives in servers, but this one has me baffled. I ...
Bjørn's user avatar
  • 276
8 votes
3 answers
15k views

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 ...
user avatar
8 votes
2 answers
11k views

What's in my ZFS ARC and L2ARC caches?

I have a simple ZFS setup at home, four disks mirrored, 8GB ram and 120GB Intel X25-M SSD for L2ARC. I ran zpool add poolname cache cXtXdX then generated load and eagerly tracked the warming process ...
notpeter's user avatar
  • 3,525
8 votes
1 answer
892 views

The setup of S2D that delivers up to 2M IOPS to SQL FCI

We are about to deploy shared storage researching for ultra-fast storage to implement Microsoft SQL Server Failover Cluster (FCI). So far the project goes, we would to start with 500K IOPS for 8k ...
Joshua Turnwell's user avatar
8 votes
3 answers
1k views

Can an SSD notify the hosting OS that its wear level is getting high?

I read a lot about SSDs and I am interested in them for server use. My biggest concern is their reliability. A lot of writes shortens their life span. I can mitigate this problem if I can run some ...
Tony_Henrich's user avatar
8 votes
1 answer
6k views

Why the performance decrease for an SSD when using Hyper-V?

I've just installed my new M4 256GB on a Windows Server 2008 R2 Hyper-V server. On the host system using Crystal Disk Mark I've got 212 Mb/s as 4k QD32 write performance, but when I create a VHD disk ...
simone manneschi's user avatar
8 votes
1 answer
6k views

Can I use dmraid instead of md (mdadm) to make software RAID-1 and RAID-1+0 volumes?

On a related question about SSDs and TRIM (see: Possible to get SSD TRIM (discard) working on ext4 + LVM + software RAID in Linux? ), it turns out that dmraid may now (or shortly) support TRIM on RAID-...
Don MacAskill's user avatar
7 votes
3 answers
11k views

What would happen if I did a raid on a SSD and an HDD?

I am building another server (cheap) and would like to go with a 256GB SSD drive for my boot and data. This will be enough for my needs, but just having one SSD scares me for a couple of reasons. If ...
Jason's user avatar
  • 3,287
7 votes
2 answers
11k views

Hetzner's installimage script, RAID1 hard drives + SSD

I just purchased a server from Hetzner, with two 4TB hard drives and one 1TB SSD. I want to setup the two hard drives (/dev/sda & /dev/sdb) in RAID1 and install the OS on them, and have the SSD (/...
Tim Autin's user avatar
  • 273
7 votes
3 answers
4k views

Optimize SSD storage on Centos 6.6 - KVM

I have a Dell R610 with hardware: H700 raid card 4xMicron MX100 512GB -> configured raid 10 I have installed Centos 6.6 on this server and configured: KVM virtualization Volume Group for raid 10 ...
user2629480's user avatar
7 votes
3 answers
10k views

What is the performance impact of disabling NCQ?

Our cluster system runs currently under CentOS7 with SSDs and NCQ disabled. What kind of a performance drop is to be expected within an i/o-heavy usage scenario? I'm not expecting a precise answer ...
Sam's user avatar
  • 81
7 votes
7 answers
8k views

What is faster? A local mechical hard drive or a solid state drive over gigabit ethernet?

SSDs are rather new, so I couldn't find this information on the Internet. Would the performance of a local hard drive connected using SATA2 get out performed by a SSD over gigabit ethernet? In terms ...
Pyrolistical's user avatar
7 votes
4 answers
6k views

dd vs. secure-erase for reconditiong SSDs

Does writing zeros to an entire ssd (dd if=/dev/zero of/dev/sdX) give the same performance restoring effect that you get from a "secure erase", or does secure erase do something else as well? ==EDIT==...
DrStalker's user avatar
  • 7,036
7 votes
3 answers
8k views

3rd party SSD drive in HP Proliant server only shows 3G transfer speed

After receiving some excellent advice in a previous question, we've bought a OWC Mercury Extreme Pro drive for use in our HP Proliant DL360 G7 server. Both the drive, and the P410i array controller, ...
KenD's user avatar
  • 1,147
7 votes
2 answers
33k views

ext4 filesystem corruption -- maybe hardware error?

I'm getting these errors in dmesg after about half an hour after I turn on the computer: [ 1355.677957] EXT4-fs error (device sda2): htree_dirblock_to_tree: inode #1318420: (comm updatedb.mlocat) ...
pts's user avatar
  • 435
7 votes
5 answers
912 views

Server SSD upgrade

I have heard SSD's are a bad idea for servers are they? Do they eliminate the requirement for RAID i.e. are they more reliable overall? The cost isn't an issue here. Can someone provide direction on ...
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