We're planning to install CentOS on a new server that will be based on two Solid-State Disks in a RAID1 configuration. The RAID management will be handled by a hardware Adaptec controller. I've learnt that the TRIM function for SSD drives is supported starting from kernel 2.6.28.
View 1 RepliesI'm looking for a way to launch "TRIM" commands to a SSD drive myself, from a c++ code I'm going to write, for flash erasing an SSD drive (and not to wait for others things that "should do it automatically in some circumstances if this or this, this and this have been enabled and [..]" but will never tell me if it worked or not
I know there is thousands of complicated ways to test and check if it worked, and also software that needs money to do so, that's why I just want to call myself the TRIM functions and read the return value (like true or false) in order to know if it worked !
Where I can find the c++ call that could permit me to do so ? I heard about the GLibC that gives a way to access every user space function related to Linux Kernel (poll, select and others) as standard c++ functions, I suppose that, if there is a way, it will be on the GLibC but how to find it ?
Does CentOS 5 support the ATA TRIM command for use with SSDs? Is the support automatic by default, or would I need to do something specific in order to enable the TRIM feature be used?
View 1 Replies View RelatedI am trying to set up an atom D525 low power PC 64-bit with a 40 GB solid state disk drive. Is it possible to specify ext4 during the install for proper SSD suupport? I read somewhere that after install I can place a -discard line in fstab to enable trim.
Edit: should I have asked this in the x86_64 forum, as I was planning on installing 64 bit?
I have a centos 5.5 server running great, but i am having issues with my xen vm01 virtual machine. The first probelm is, i have created the vm01 fine and it was running ( even though i can not login into it ) by running:
vm console vm01
I had installed PHP using yum install php. I am trying to use the pdf_new function to create pdfs from existing text files, but I get this error PHP Fatal error: Call to undefined function pdf_new()I have noticed that when I run the phpinfo() command, I cannot find the PDF phrase at all. My php.ini file does not even have these two linesextension=php_pdf.dll extension=php_cpdf.dll kind of command I should use if I need to build PDFs using PHP on Centos 5?
View 1 Replies View RelatedI am trying to install vmware server on CentOS: In vmware installation guide it says before intalling:
Before you begin, read the following notes and make adjustments to your host system: The realtime clock function must be compiled in your Linux kernel. The parallel port PCstyle hardware option (CONFIG_PARPORT_PC) must be built and loaded as a kernel module (that is, it must be set to m when the kernel is compiled).
I'm newbie with Centos. I have got a server with Centos 5.2 and I need to use PHP 5 >= 5.1.0 function as timezone_open. So that, I follow this guide to update php. Now, I have got PHP 5.1.6 (cli) (built: Mar 31 2010 02:44:37). I create a simple test.php: Quote:<?php $var = timezone_open('UTC');print_r($var);?>
View 3 Replies View RelatedI bought a multifunction stylus sx218 Espon model and I can not run the scanner function. I did some research and found a few solutions and very functional. I hope someone solves the problem. My version of openSUSE 11.2.
View 9 Replies View RelatedCode:
#include <iostream>
using namespace std;
[code]...
I am doing some Linux kernel programming for my research project. I need to record the timestamp (by using cpuid and rdtsc) when an interrupt handler (top half) is first invoked. Due to the time critical nature of the problem itself, I have to do the timestamping inside the interrupt handler itself (the first operation when the handler is called). However, I understand that tasks that are not so time critical should be deferred to a tasklet function (bottom half) for processing because other interrupts are disabled in a (top-half) interrupt handler. I am currently out of idea on how I can pass the timestamp information that I have obtained in the interrupt handler to the corresponding tasklet function.
View 2 Replies View RelatedSeveral of the the items in the menu System --> Administration do not function. They say they are starting but fail to come up then disappear of the task bar. Is there anywhere i can look to see why it has failed to come up?
All item in the menu except; Display, Hardware, Server Settings, System Monitor
I have a situation where there are no logs in /var/log/messages and this has happened the second time during two weeks.
Snapshot of the screen was taken when this happened and the server was restarted. Since it's a time sensitive matter.
Snapshot:[url]
I'm currently using OpenSuse 11.1 web server. This is bad since 11.1 is no longer supported. the reason why I am using it is because Function set_magic_quotes_runtime() was no longer being used. (so I was told)
That being said, is there a way to get Function set_magic_quotes_runtime() to function on the newer versions of OpenSuSE?
the function terminates if no key is pressed for 10 consecutive seconds. I tried using the -t option as suggested in some forums, but my version of showkey doesn't have the option of changing the timeout. The options I get are:
-h --helpdisplay this help text
-a --asciidisplay the decimal/octal/hex values of the keys
-s --scancodesdisplay only the raw scan-codes
-k --keycodesdisplay only the interpreted keycodes (default).
Is it possible to write a script to use this function and still keep the function active until an interrupt is recieved?
I am wondering if Ubuntu support ATA TRIM for SSD out of the box?
View 1 Replies View RelatedI was running it portable on a 4gb usb drive via virtual box which worked great unless I used a computer that had virtualbox on it. The portable version would remove files that the original version needed. I decided to try Qemu. The problem is that the portable version only allows 1gb of space to install regardless the size of a usb drive. so the question is: Is there was a way to trim ubuntu 9.10 down to less than 1gb of disk space? If not is there another portable emulator that could be used instead? the only uses for this are for the use of evolution and opera in a linux environment.
View 3 Replies View RelatedOk, Im likely to buy SSD 128gb drive and install Fedora 14 on it...but I have a question. If I go with ext4 will I get TRIM to work out of the box? Whats the status of kernel support on trim?
View 8 Replies View RelatedI have an OCZ Vertex SSD...the 30GB variety. recently I upgraded my kernel to 2.6.33. I have read that that is all that is needed in order for trim to just start working. Is there a way that I can verify that TRIM is working?I'm debating getting the Vertex2 100GB model because I love my SSD now, but would love to have a little more storage space. I just don't want to buy it without TRIM working.
View 4 Replies View RelatedFor anyone who is not familiar with it, I am talking about the trim functionality in the 2.6.33 kernel for solid state drives.
View 6 Replies View RelatedI followed this tutorial [URL] to enable my TRIM support and now my fstab looks like this:
Quote:
# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
[Code].....
but when I follow the second half of the tutorial http://lightrush.ndoytchev.com/rando...bledandworking to check and make sure it's working I don't get all zeros like I'm supposed. I tried waiting a while like I saw in another tutorial as well and check it again.. Still random numbers and no zeros.
First system specs. Gateway Solo Pro 9300, 433Mhz, 288megs. OS Slackware 13.1 32-bit and KDE.
As I get more comfortable with Linux I find that I am doing more waiting for the computer to catch up.
Would it be better to trim down KDE or change to a lighter GUI? If I change to a lighter GUI will I have to reinstall things I have installed under KDE?
I just bought a Samsung 850 Pro 250GB SSD drive and have since then found out that Linux has/had a faulty implementation of queued trim (which is a synonym for NCQ I think). I'm using kernel 4.1.0 (the default selected by the Debian 8.1 installer) and I've read that Samsung drives are blacklisted for queued trim by the recent kernels. However, the output of dmesg contains the following lines, with and without TRIM enabled for the drive (i.e. with or without the "discard" option in fstab for the drive):
Code: Select all[ 1.012287] ata6.00: 1953525168 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
[ 1.013438] ata5.00: failed to get NCQ Send/Recv Log Emask 0x1
[ 1.013440] ata5.00: 488397168 sectors, multi 1: LBA48 NCQ (depth 31/32), AA
[ 1.015037] ata5.00: failed to get NCQ Send/Recv Log Emask 0x1
Since the depth is not 1 but rather 31, it looks like NCQ is enabled. I've disabled TRIM on the drive for now, and whether it's safe to enable TRIM or not.
Does Suse have any software based TRIM support available or that is in the works?I know there is to a degree new firmware becoming available that supports TRIM (although some are pretty rudimentary) but windows 7 does a fairly good job software side and upgrading the firmware occasionally involves the unbridled joy that is wiping the drive and starting again.
View 1 Replies View RelatedThere are not SSDs with TRIM support available in my region that fit into my laptop (1.8", IDE, ZIF). I'm running Ubuntu 10.10.
Most articles (or questions on superuser) I've come across concering TRIM (or the lack thereof) date back to 2009, when not many SSDs with TRIM support were available and OS support was still very fresh.
I'm interested in the current situation, but I couldn't find too much information about it.
What are currently the "best practices" for using an SSD without TRIM under Linux?
I've read about the wiper script included with hdparm. Do I understand correctly that I could use this to free unused blocks, e.g. by running it once a month?
Some sources state that HFS+ (the default-filesystem of Mac OS X) doesn't suffer as badly from lack of TRIM as other filesystems. How about linux filesystems? Are there filesystems that are better suited for SSDs without TRIM than others?
My partition /dev/sda3 on an SSD drive doesn't contain any filesystem, but it contains garbage. How do I do a TRIM/DISCARD operation on the whole partition?
View 2 Replies View RelatedThe situation with TRIM in Ubuntu has me utterly confused. I don't know whether I need to manually run it or not. Sources I've found are disparate and unclear. I have Ubuntu 10.04 with latest updates (including kernel 2.6.32-26). I have an Intel X-25M drive with latest firmware, and it is formatted as ext4. So, does TRIM support run automatically? If not, how do I check if I need to run it, and then how do I run it if necessary?
View 1 Replies View RelatedIn windows the only controllers that really work with TRIM is the onboard Intel ones, Jmicron, Marvell, Nvidia and AMD's don't pass the command to the drives if you use their own drivers. (And from what Ive read, the Micron sata6 controllers don't work with TRIM even using the default Microsoft drivers). In Linux do more then just Intel drives work with TRIM? I have a Nvidia 790i Ultra motherboard, the SATA controller is an Nvidia one which has 2 settings, ATA and Raid (if the drives aren't added to an array it runs them in AHCI) and has an additional Jmicron sata port.
If I enabled TRIM in the OS, would it work on either of those controllers? Also if anyone knows this, in Windows if you set an Intel controller to raid, you wont get TRIM on SSD's that are on the controller (but not in an array) with the default Microsoft driver like you would if it was set to AHCI, you only get it with the Intel RST drivers. Would a SSD on an Intel controller set to raid but not in an array get the TRIM command passed to it in Ubuntu?
does Debian Lenny 5.0.4 stable supports SSD TRIM? If not, what package i need to add if i buy a new SSD and dont want to loose Hard Disk Performance over time?
View 14 Replies View RelatedI'm moving over to Linux when the new SSD arrives. SSD gives increased performance, so I thought that I could encrypt everything.
But then I came to think about TRIM, and garbage collection on the drive. Will a LUKS encrypted drive affect the garbage collection system? (TRIM).