Tagged Questions
1
vote
1answer
30 views
Implementing Linux fstrim on SSD with software md-raid
I'm currently building a new Ubuntu 13.04 server with 2 256GB SSDs in a raid mirror to run a MariaDB instance. We typically place LVM on top of dm-crypt encryption on top of an md raid 1 array, but ...
-1
votes
1answer
99 views
Disk IO in Linux is slow (2MB/sec) while in Windows its fast (400MB/s) [closed]
I have a server with an ASUS board with a 256GB SSD
In Windows, using HDTune my drive shows 400MB/sec
on Linux, I'm getting about 2MB/sec using
root@desktop:/# dd if=/dev/zero of=/foo bs=1024k ...
1
vote
1answer
51 views
TRIM persistence across reboots
Let's say we have an ext4 filesystem image we dumped onto an SSD (with dd). After a few mounts we learn that we should use the discard flag to emit TRIM commands to the drive. As it is unclear ...
-2
votes
2answers
121 views
whats the difference between 1lane and 2lane with SATA-3 speeds? [closed]
I read the beauty of PCIe is that a designer can combine two, four, eight or sixteen of PCIe lanes into a single data port.
2.5 Gb/s PCIe×1
5 Gb/s PCIe×2
I have two sata 3 drives that I want to ...
6
votes
1answer
527 views
Why is this SSD drive failing with bad sectors, and was it predictable?
Note: this question was previously closed as off-topic. You can read the discussion. My reasons for asking it here are:
This drive is in an offline content cache server for schools in rural Zambia.
...
0
votes
0answers
54 views
Intel RS2BL080 hardware raid controller and SSDs
I am looking to upgrade my server that I am renting from my hosting provider to something faster.
What they are offering is an Intel RS2BL080 with up to 6 Intel 520 Series 240gb ssds
This is all they ...
1
vote
1answer
147 views
Is there a Linux/Ubuntu tool to measure total writes performed to SSD
I've searched the internet to find a tool/utility which can tell me the total writes performed to an SSD (or a normal disk). The output should look something like this:
SSD Intel 320S :-
Total data ...
0
votes
1answer
167 views
8kb block sizes as it relates to different storage layers
I have a PCIe SSD card that uses 8kb block cells. It supports "Virtual Controllers" that
can split this drive in half and create LVM RAID0 with 8kb stripe size.
On top of that I install a file system ...
-2
votes
1answer
85 views
What errors would be logged if SSD is failing or has failed in RAID 1?
What are the errors, if any, that would be observed on /var/log/messages if an SSD is failing or has failed? I would like to know how such errors would be worded so that it could be picked up by an ...
0
votes
0answers
270 views
Formatting SD card with yaffs2 (using mtd2block)
An answer to my previous question: Making SD card corruption-proof suggested using mtd2block and formatting the SD card with yaffs2 or JFFS2.
I don't really have experience with creating images of ...
2
votes
1answer
310 views
Server responses “bus error” to every command
I have a linux machine dedicated to MySQL server with a pretty high load. Today I woke up and was terrified to see, that database server is down. I could connect to it via SSH, but it was responding ...
0
votes
2answers
176 views
SSD suddenly full
Today the hard drive of our server was suddenly full. The disk usage always stayed around 50 % in the weeks and months before (old data is regularly expunged from the server).
I deleted 10 GB of ...
0
votes
0answers
25 views
Does SSD TRIM (discard) work on ext4 + nested LVM in Linux? [duplicate]
Possible Duplicate:
Possible to get SSD TRIM (discard) working on ext4 + LVM + software RAID in Linux?
I will be setting up KVM guests on a computer of mine soon. I plan to run Ubuntu ...
0
votes
1answer
356 views
Is wiper.sh working?
I'm setting up a server running Ubuntu Precise, and I'm trying to verify if SSD TRIM is working.
fstrim is failing:
~ sudo fstrim -v /
fstrim: /: FITRIM ioctl failed: Operation not supported
So ...
0
votes
1answer
402 views
ZFS SSD Trim and Software Raid 5
I am trying to find if the ZFS filesystem has added support for Trim to Raid 5? I am setting up an SSD array in Raid 5. I also would like to know if there is any good software raid 5 alternatives to ...
12
votes
1answer
142 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 ...
5
votes
1answer
266 views
Linux software RAID5 on SSD. One SSD 40% more worn out than the others
We have a 6 SSD, RAID5 volume. The SSD disks we are using are Crucial M4-CT512M4SSD2 firmware 000F.
We write 100 ~ 200GB data through MySQL InnoDB to the volume daily. The RAID5 volume is only used ...
4
votes
1answer
251 views
Is TRIM passed through a LVM-based PV Xen domU to the underlying SSD
Scenario:
-- Debian Xen dom0
-- SSD drive setup as LVM PV/single Volume Group.
-- Debian pv_ops-based domU setup on LVM logical volume.
-- File system inside domU is ext4 with discard option enabled.
...
-3
votes
4answers
2k views
What RAID controller comes with DL360 G7?
I plan to setup RAID10 using SSD drives.
What RAID controller comes with the HP DL360 G7?
Is it a real Hardware RAID controller?
And it is compatible with CentOS Linux?
Will SSD be ok in RAID10?
4
votes
1answer
2k views
Filesystem and partitioning for SSDs on Linux
What are the best practices for using an SSD on a Linux workstation?
Specifically, I'm interested in:
What mounts I should put on the SSD and what I should keep on my HDD
What filesystem I should ...
1
vote
1answer
420 views
Is it possible to get hdparm to report the current level of performance degradation on my SSD?
I work on a product that is a headless Debian Linux system with removable Intel X-25M solid state drives. Recently we noticed that the read/write performance of these drives degrades over time, and ...
2
votes
2answers
1k 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) ...
0
votes
2answers
266 views
Recommended filesystem, mysqltmp and filesystem related settings for a mysqld box running ssd + BIG ram + linux?
What is the recommended filesystem + mysqltmp location when dealing with a ssd based system that has some ram to spare?
Currently we run our mysqltmp folder on a 4gb tmpfs partition. Works great. But ...
6
votes
3answers
4k views
How to determine number of write cycles or expected life for SSD under Linux?
We've been running an SSD (Intel X25-M) in a Linux (RHEL 5) server for a while, but never made any effort to figure out how much write load it was under for the past year. Is there any tool under ...
3
votes
3answers
515 views
Using SSD drives in a raid in an operation involving little to no deletes
From what I've been able to understand when reading about the case with Solid State drives and raids, the problem is that TRIM cannot be used for them in a raid configuration, thus, resulting in the ...
1
vote
1answer
341 views
How should I partition a 64GB SSD for multiple Linux installations? [closed]
Are there any things I should keep in mind in order to increase the longevity and efficiency of my SSD?
4
votes
1answer
112 views
RAID Mirror with difference HD types
Can a SSD and a non SSD be setup in a Mirrored raid configuration (non software)?
19
votes
6answers
6k views
Verify TRIM support with BtrFS on SSD
We are looking into using BtrFS on an array of SSD disks and I have been asked to verify that BtrFS does in fact perform TRIM operations upon deleting a file. So far I have been unable to verify that ...
2
votes
2answers
157 views
SSD linux aligment
Hi I have bought a ssd disk and Im not sure if I aligned it correctly. If I understand it correctly the starting sector should be dividable with 512 and it does not matter when the partition ends as ...
3
votes
1answer
965 views
Is TRIM possible on SSD disks in RAID 1?
I am going to build a new server to handle a high-traffic php/mysql site. I am going to use SSD disks to benefit from fast random read performance but really got confused about choosing the right SSD ...
0
votes
2answers
254 views
what should i do with an extra ssd disc?
I have this server setup: http://www.server4you.com/root-server/server-details.php?products=5
That gives an extra 60 GB OCZ Vertex 2 SSD hard-disk. I don't want to use it as storage. What should i do ...
1
vote
3answers
275 views
Experience with Intel X25-M 160GB and Oracle
We're considering building an Oracle database with 12 Intel X25-M G2 160GB drives in software RAID10. It'd be running Linux. Database gets some very heavy write activity during the early morning data ...
9
votes
6answers
8k views
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 ...
4
votes
3answers
1k views
Measuring 'total bytes written' under Linux
We're quite interested in exploring the possibility of using SSD drives in a server environment. However, one thing that we need to establish is expected drive longevity. According to this article ...
8
votes
1answer
2k 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 ...
11
votes
3answers
3k 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 ...
16
votes
6answers
8k views
Possible to get SSD TRIM (discard) working on ext4 + LVM + software RAID in Linux?
We use RAID1+0 with md on Linux (currently 2.6.37) to create an md device, then use LVM to provide volume management on top of the device, and then use ext4 as our filesystem on the LVM volume groups.
...
6
votes
3answers
2k views
Causes of sudden massive filesystem damage? (“root inode is not a directory”)
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 ...
0
votes
2answers
3k views
How to “align” a Linux file system with a SSD?
I'm interested in getting a dedicated server with a SSD, probably Corsair Force series CSSD-F120GB2-BRKT.
It'll be an Linux server, most likely running XFS (but I'm open to other alternatives).
...
1
vote
1answer
848 views
SSD dm-crypt partition alignment
I have installed an Intel X25-M SSD in my work laptop. I want to encrypt this SSD with LUKS and install Ubuntu 10.04 on it. LVM is not needed so this will not be configured.
The articles on SSD i ...
4
votes
2answers
1k views
What is the best Solid State File System (SSDFS) for Linux?
EXT4 is not a solid state file system. It won't take full advantage of the hardware and it will ware out the drive. So what is the best Solid State File System for Linux? I am looking forward to ...
2
votes
2answers
1k views
What are the best options for a root filesystem hosted on SSD under Linux
I'm working on an embedded system which is going to be booting and hosting it's rootfs on an SSD disk. We are currently looking at using Intel X-18M SSDs.
The file system structure will have a fairly ...
4
votes
4answers
3k views
Linux tool to reset Intel X25 SSDs wear leveling tables?
I'm aware of the DOS utility to "Reset" an Intel SSD to factory settings, but I'd rather not shut down my system to do this to my SSDs.
Supposedly newer kernels support TRIM, but I haven't found any ...
4
votes
5answers
1k views
SSDs as Linux swap for large virtual mem applications?
This question topically touched on this, but running on 64-bit Linux, I have a set of data caching JVMs as well as wanting a large web cache. Each cache today is configured to in gross fit in system ...
7
votes
4answers
3k 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 ...
3
votes
3answers
793 views
Recommended 256 GB SSD for Linux servers
I need some relatively-affordable 256 GB SSD drives for a Linux application where fast seek performance (many IOPS) is more important than sequential throughput. The ratio of reads to writes is more ...
8
votes
8answers
5k views
Home-brew automatic tiered storage solutions with Linux? (Memory -> SSD -> HDD -> remote storage)
Related to this question about using an SSD for system and HDD for data, except I would like my system to do this automatically...
Is it possible to have several layers of storage and push items ...
0
votes
3answers
737 views
Filesystems for webserver with SATA and Solid State disk,
We have just ordered a new webserver with 120 Gb solid state disk and a SATA disk. I am trying to plan ahead what sort of filesystem to use.
This system will be running Linux, Apache/Tomcat to host ...
4
votes
6answers
1k views
Most Appropriate log-structured file system to use with Linux / SSD?
With the development of log-structured filesystems and the introduction of (relatively) inexpensive SSDs, is there a best choice for a log-structured filesystem for use on Linux with SSD drives?
