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  • Resizing RAID 1 Array on Dell PowerEdge with Perc 4/Di & Windows SBS 2003

    - by Scott McKinney
    I have a Dell PowerEdge 2600 with Perc 4/Di RAID card and Windows SBS 2003 installed. The original system drive was a set of 17GB drives in a RAID 1 array. Over the years, these drives have failed (individually) and been replaced by a set of 73GB drives, but the RAID array is still 17GB in size. Is there a safe procedure to resize the RAID 1 array to use the entire 73GB without destroying/corrupting the data on the array? The Perc documentation mentions a Reconstruct option with Online Capacity Expansion, but is a woefully short on the exact details. Has anyone performed this procedure successfully (or unsuccessfully)? What were the steps? Are there any gotchas I should watch out for?

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  • grub-efi refuses to chainload Windows 8.1

    - by Alexei Averchenko
    I have installed LMDE (with grub in MBR) after I installed Windows 8.1. I then installed the grub-efi package and added the custom Windows options: #!/bin/sh exec tail -n +3 $0 menuentry "Windows" { search --fs-uuid --no-floppy --set=root A89A-7F4C chainloader (${root})/EFI/Boot/bkpbootx64.efi } menuentry "Windows (backup bootloader)" { search --fs-uuid --no-floppy --set=root A89A-7F4C chainloader (${root})/EFI/Microsoft/Boot/bkpbootmgfw.efi } These are basically a leftover from my older Ubuntu setup. However, grub is refusing to load them, complaining about the invalid signature. What do I do now?

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  • UnicodeEncodeError when uploading files in Django admin

    - by Samuel Linde
    Note: I asked this question on StackOverflow, but I realize this might be a more proper place to ask this kind of question. I'm trying to upload a file called 'Testaråäö.txt' via the Django admin app. I'm running Django 1.3.1 with Gunicorn 0.13.4 and Nginx 0.7.6.7 on a Debian 6 server. Database is PostgreSQL 8.4.9. Other Unicode data is saved to the database with no problem, so I guess the problem must be with the filesystem somehow. I've set http { charset utf-8; } in my nginx.conf. LC_ALL and LANG is set to 'sv_SE.UTF-8'. Running 'locale' verifies this. I even tried setting LC_ALL and LANG in my nginx init script just to make sure locale is set properly. Here's the traceback: Traceback (most recent call last): File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/core/handlers/base.py", line 111, in get_response response = callback(request, *callback_args, **callback_kwargs) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/contrib/admin/options.py", line 307, in wrapper return self.admin_site.admin_view(view)(*args, **kwargs) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/utils/decorators.py", line 93, in _wrapped_view response = view_func(request, *args, **kwargs) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/views/decorators/cache.py", line 79, in _wrapped_view_func response = view_func(request, *args, **kwargs) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/contrib/admin/sites.py", line 197, in inner return view(request, *args, **kwargs) File "/srv/django/letebo/app/cms/admin.py", line 81, in change_view return super(PageAdmin, self).change_view(request, obj_id) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/utils/decorators.py", line 28, in _wrapper return bound_func(*args, **kwargs) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/utils/decorators.py", line 93, in _wrapped_view response = view_func(request, *args, **kwargs) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/utils/decorators.py", line 24, in bound_func return func(self, *args2, **kwargs2) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/db/transaction.py", line 217, in inner res = func(*args, **kwargs) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/contrib/admin/options.py", line 985, in change_view self.save_formset(request, form, formset, change=True) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/contrib/admin/options.py", line 677, in save_formset formset.save() File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/forms/models.py", line 482, in save return self.save_existing_objects(commit) + self.save_new_objects(commit) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/forms/models.py", line 613, in save_new_objects self.new_objects.append(self.save_new(form, commit=commit)) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/forms/models.py", line 717, in save_new obj.save() File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/db/models/base.py", line 460, in save self.save_base(using=using, force_insert=force_insert, force_update=force_update) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/db/models/base.py", line 504, in save_base self.save_base(cls=parent, origin=org, using=using) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/db/models/base.py", line 543, in save_base for f in meta.local_fields if not isinstance(f, AutoField)] File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/db/models/fields/files.py", line 255, in pre_save file.save(file.name, file, save=False) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/db/models/fields/files.py", line 92, in save self.name = self.storage.save(name, content) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/core/files/storage.py", line 48, in save name = self.get_available_name(name) File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/core/files/storage.py", line 74, in get_available_name while self.exists(name): File "/srv/.virtualenvs/letebo/lib/python2.6/site-packages/django/core/files/storage.py", line 218, in exists return os.path.exists(self.path(name)) File "/srv/.virtualenvs/letebo/lib/python2.6/genericpath.py", line 18, in exists st = os.stat(path) UnicodeEncodeError: 'ascii' codec can't encode characters in position 52-54: ordinal not in range(128) I tried running Gunicorn with debugging turned on, and the file uploads without any problem at all. I suppose this must mean that the issue is with Nginx. Still beats me where to look, though. Here are the raw response headers from Gunicorn and Nginx, if it makes any sense: Gunicorn: HTTP/1.1 302 FOUND Server: gunicorn/0.13.4 Date: Thu, 09 Feb 2012 14:50:27 GMT Connection: close Transfer-Encoding: chunked Expires: Thu, 09 Feb 2012 14:50:27 GMT Vary: Cookie Last-Modified: Thu, 09 Feb 2012 14:50:27 GMT Location: http://my-server.se:8000/admin/cms/page/15/ Cache-Control: max-age=0 Content-Type: text/html; charset=utf-8 Set-Cookie: messages="yada yada yada"; Path=/ Nginx: HTTP/1.1 500 INTERNAL SERVER ERROR Server: nginx/0.7.67 Date: Thu, 09 Feb 2012 14:50:57 GMT Content-Type: text/html; charset=utf-8 Transfer-Encoding: chunked Connection: close Vary: Cookie 500 UPDATE: Both locale.getpreferredencoding() and sys.getfilesystemencoding() outputs 'UTF-8'. locale.getdefaultlocale() outputs ('sv_SE', 'UTF8'). This seem correct to me, so I'm still not sure why I keep getting these errors.

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  • Folder redirection save times are awful slow

    - by wbmeu
    I recently set up folder redirection for Documents on Server 2008, but it's painfully slow at the moment. My users are all using Visual Studio 2010, and a save takes 20-30 seconds (whereas it used to take 2 seconds locally). I understand this is because they are being saved to the server, and that takes time (though I did think it would be faster over a gigabit link, with servers on the same network). I enabled offline files on the share, set the option to All files or folders, and enabled Optimize for performance. I thought that this would pull all the files down locally (which I think it did), allow local editing of said files, synchronizing them quietly in the background from time to time (which it does not do - saves right to the share). Is there any way I can speed this process up a bit? Any other tweaks I can do?

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  • Windows 7 "Backup completed but some files were skipped"

    - by Andrew Coleson
    I set up Windows 7 Pro to backup my files to a network path (woohoo!) and chose to backup "data for newly created users, libraries", and my user folder (no system image). All went fine (although the first backup took ~12 hours for some ridiculous reason), but at the end it gave me a message that "Your backup completed, but some files were skipped. Click to see which files." I checked and the "files" skipped were my 3 network-mapped drives, which is perfectly fine and reasonable behavior (I certainly don't need it to back up my network-mapped drives as part of my local PC backup), but in the Backup and Restore center it warns me that my Last backup was "Never" and the Action Center now has a permanent "Check your backup results" issue. Is there any way to set up the backup to exclude the network-mapped drives or tell it that I really don't mind that it skipped drives I never asked it to back up?

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  • Sending email using SMTP (Gmail) from Hudson CI

    - by jensendarren
    How can I set up Hudson CI so that I can send out emails from the server following a build failure? At the moment all I get is the following error: com.sun.mail.smtp.SMTPSendFailedException: 530 5.7.0 Must issue a STARTTLS command first One solution is to start Hudson as follows: java -Dmail.smtp.starttls.enable="true" -jar /usr/share/hudson/hudson.war However, I am already using the following to start Hudson: sudo /etc/init.d/hudson start I am thinking the solution is to somehow set the system property mail.smtp.starttls.enable in a property file somewhere, but I have no idea how to do that. What are my options? Thank you all in advance!

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  • Merging Two KML Files to Display Them with Different Marker Icons on Google Maps

    - by Maxim Z.
    Let's say that I have two spreadsheets with addresses. I uploaded these spreadsheets into Google Fusion Tables, geocoded the addresses, and exported the results as KML files. Now, I want to take these two KML files and merge them, while maintaining the location data and using it to map the points with Google Maps. Well, I found a way to easily merge the KML files: import both of them into a "My Maps" map with Google Maps! However, my problem is this: when I do that, all of the locations in my data have the same marker icon on the map. From past experience, I know that these markers can be somehow defined inside the KML files. Is it possible to combine these two KML files while giving one's points one marker icon and the other's points another marker icon? Just in case my question is confusing, what I mean, is giving the first set of points blue markers, for example, and the other set of points red markers, so that they can be overlayed.

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  • Remote Desktop to Virtual Machine

    - by Valvaris
    Hello: I recently reformatted one of my servers with Windows Server 2008 x64 and with that, installed the latest version of VMWare server on it. Within that, I created a new Windows Server 2003 R2 x86 virtual machine for the purposes of being a backup domain controller. I was able to successfully configure it as a domain controller and have it provide DNS service to my domain. I've been using the VMWare remote console to set this up and figured it was time to get remote desktop working. I set it up as I have with many other computers on my network (hitting the checkbox, making the firewall isn't blocking it) and I cannot get remote desktop to connect to it. I've tried using the computer name and its IP address neither work. I can ping the computer from the outside but the Virtual machine cannot ping anything from inside it. All machines are on the same subnet. I can't seem to figure this out.

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  • Setting up Ubuntu Server on Amazon EC2 for hosting multiple domains with wildcard subdomains

    - by Ashish Kumar
    I'm trying to set up multiple domains on my Amazon EC2 micro instance running Ubuntu Server 12.04. I installed Apache correctly and set up virtual hosts but having problems with wildcard subdomains. This is what my httpd.conf file looks like NameVirtualHost *:80 <VirtualHost *:80> UseCanonicalName Off VirtualDocumentRoot /home/username/domains/%0/html/ </VirtualHost> My DNS records (on Amazon Route 53) are: domain.tld A 1.2.3.4 *.domain.tld A 1.2.3.4 If i create a test.domain.tld directory with the html subdirectory, it works fine. But what I want to do is to redirect *.domain.tld to domain.tld in case there is no directory for the sub-domain accessed. I would also like www.domain.tld to redirect to domain.tld. The system should also work if I decide to host another website, example.com, on the server. I tried Googling a lot but without any luck. Suggestions?

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  • What are some of the best wireless routers for a price-conscious home power-user?

    - by Alain
    I'm extremely dissatisfied with the 'popular' choice for routers in homes and small offices. They are expensive (upwards of 60$), lack a great deal of useful configuration options, and seem to need to be restarted quite often. (Linksys comes to mind). I've been on the market for a good router lately, and slowly collecting a set of requirements I feel good routers should meet. Maximum number of TCP/IP connections. - This isn't something I see any routers advertise, but in terms of supporting torrent applications, I've been screwed by routers that support less than 20 here. From what I understand a fairly standard number is 200, but there are not so expensive routers that support thousands. Router configuration menu - Most have standard menu's that let you set up basic things like your wireless network encryption settings, uPnP, and maybe even DMZ (demilitarized zones). An absolute requirement for me, however, are routers with good enough firmware to support: Explicit Port forwarding Assigning static local ips to specific mac addresses, or at least Port forwarding by MAC address Port, IP and MAC filtering Dynamic DNS service for home users who want to set up a server but have a dynamic IP Traffic shaping (ideally) - giving priority to packets from certain machines or over certain ports. Strong wireless signal - If getting a reliable signal requires me to be so close to the router that I can connect an Ethernet cable, it's not good enough. As many Ethernet ports as possible. - Because I want to be able to switch from console gaming to PC gaming without visiting my router. So far, the best thing I've stumbled upon (in the bargain bin at staples) was a 20$ retail plus router. It was meant to be the cheapest alternative until I could find something better to purchase online, but I was actually blown away by the firmware capabilities. It supports defining reserved bandwidth for certain network traffic, dynamic DNS, reserving local IPs for specific MAC addresses, etc. At 2 am when my roommate is killing our Internet with their torrents, I can limit their bandwidth without outright blacklisting them. I have, however, met serious limitations when it comes to network traffic between local machines. It claims a 300Mbps connection, but I have trouble streaming videos from my PC to my console or other laptops wirelessly. It has a meltdown and needs to be reset once in a while (no more than a couple times a month), and it's got a 200 connection limit. There 4 Ethernet ports in the back but I'm pretty sure the first doesn't work. So some great answers to this question would be: Any metrics you use to compare routers, and requirements you have for new candidates. The best routers you've found for supporting home servers, file management systems, high volume torrent traffic, good price/feature ratio, etc. Good configuration advice (aside from 'use Ethernet whenever possible') Thanks for your feedback and experiences!

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  • Samsung printer (ML-1640) margin problem

    - by Rytis
    I just got a new laser printer, Samsung ML-1640, and it has once again confirmed my experience that Samsung printers suck badly. The printer prints fine, except that the top margin is set at random, usually very small, cutting text on the top of page off. I tried updating firmware, getting new drivers, but nothing helped. I tried changing paper types, and it seemed that with the paper set as "plain" it was OK, but I just tried printing again after letting the printer rest for the night, and wasted 6 pages until I managed to print 2 boarding passes... Is there anything else I could try to resolve the issue?

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  • Can not input or print Chinese on PuTTY

    - by hetaoblog
    On Red Hat Enterprise Linux AS release 3, I've set my environment variable as below $ echo $LANG zh_CN.UTF-8 $ echo $LANGUAGE zh_CN.UTF-8 $ echo $SUPPORTED en_US.UTF-8:en_US:en:zh_CN.UTF-8 $ locale LANG=zh_CN.UTF-8 LC_CTYPE="zh_CN.UTF-8" LC_NUMERIC="zh_CN.UTF-8" LC_TIME="zh_CN.UTF-8" LC_COLLATE="zh_CN.UTF-8" LC_MONETARY="zh_CN.UTF-8" LC_MESSAGES="zh_CN.UTF-8" LC_PAPER="zh_CN.UTF-8" LC_NAME="zh_CN.UTF-8" LC_ADDRESS="zh_CN.UTF-8" LC_TELEPHONE="zh_CN.UTF-8" LC_MEASUREMENT="zh_CN.UTF-8" LC_IDENTIFICATION="zh_CN.UTF-8" LC_ALL=zh_CN.UTF-8 Meanwhile I've set PuTTY's transmission encoding as utf-8 and appearance-font setting to have a font as 'Fixedsys' which does support chinese. However, when I try to print a file with Chinese, it can not print it correctly $ cat 1.txt hello¦¦¦ $ and I can not input Chinese correctly on shell.

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  • Use Dynamic DNS to access Java servlet, still need port forward ?

    - by Frank
    If I use Dynamic DNS such as the free service at https://www.dyndns.com, do I still need to set up static IP and do port forward ? I have a DSL, most likely with dynamic IP address, and I run a Java servlet to get Paypal IPN messages on my notebook, in order for the messages to reach my notebook, I : [1] set up static IP and [2] did port forwarding. But I found each time the PC re-starts, it has a different external IP, so I was suggested to [3] get Dynamic DNS service like the free one mentioned above, but now I'm a bit confused, if I have step [3], do I still need to do [1] and [2], isn't step [3] supposed to do [1] and [2] for me ? But since I've already done [1],[2], now I wonder if they would cause trouble for step [3], do I need to undo them ? Or do I need all of them together ?

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  • Using QoS to prioritize IP addresses

    - by Tristan
    I have a Western Digital N900 router. I was hoping I'd be able to throttle users based on their MAC address with it, which isn't possible sadly. Seems simple in principle though, duh. The battle against bandwidth hogging roomates rages on. Could I just set the local IP range to their IP, and then set the Local port range to every single port in existence. Then prioritize their IP to lower than mine? Will this work? What are all the ports? And what's the difference between Local and Remote IPs or Ports? Name: Roomate, Priority: Low, Protocol: TCP or UDP ??, Local IP Range: .101 to .101, Local Port Range: 0 to infinity, Remote IP Range: ? to ?, Remote Port Range: ? to ?

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  • Godaddy hosting with dynamic ip?

    - by Razor Storm
    I bought a domain name on godaddy.com let's call it www.website.com, but my server has a dynamic ip, how do I resolve this issue? What I've tried: get a dns account at dyndns.com let's call it dns.dyndns.com, so I set up godaddy to forward the domain to dns.dyndns.com. problem: When the user goes to www.website.com, they see dns.dyndns.com in the url bar. Bad So then I set up the forwarding on godaddy to forward with domain masking, but then the problem is now that users can't even see url paths/get queries/ or hash marks anymore! `www.website.com/folder/search?id=4#ajax=4` becomes just www.website.com in the url bar. bad! What do I do?

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  • MS Server 2008 R2: DNS Redirection on second server for website

    - by Alain
    We have a website on a secondary server that we want this website to be accessible from Internet, with www.mywebsite.com. In the domain name provider of www.mywebsite.com, we set our 2 dns names, dns1.company.ch, dns2.company.ch and our static ip address. System is set as following: MS Server 2008 R2 N°1: Main server, in AD With IP 192.168.1.100 With DNS zone dns1.company.ch With DNS secondary zone from server N°2: dns2.company.ch With DNS secondary zone from server N°2: mywebsite.com (zone transfer is on) MS Server 2008 R2 N°2: Secondary server, not in AD With IP 192.168.1.101 With DNS zone dns2.company.ch With DNS zone mywebsite.com with host: 192.168.1.101 With the website under ISS with bindings www.mywebsite.com:80, mywebsite.com:80 All traffics for ports 80 (http) and 53 (dns) from Internet goes to server N°1. How can we redirect all traffics for www.mywebsite.com from Internet to our secondary server so the corresponding website can be displayed in Internet ? Note: Under DNS of server N°1, we tried to use also a conditional redirector mywebsite.com (192.168.0.101), but it was working only for intranet. Thank you, Alain

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  • LVS TCP connection timeouts - lingering connections

    - by Jon Topper
    I'm using keepalived to load-balance connections between a number of TCP servers. I don't expect it matters, but the service in this case is rabbitmq. I'm using NAT type balancing with weighted round-robin. A client connects to the server thus: [client]-----------[lvs]------------[real server] a b If a client connects to the LVS and remains idle, sending nothing on the socket, this eventually times out, according to timeouts set using ipvsadm --set. At this point, the connection marked 'a' above correctly disappears from the output of netstat -anp on the client, and from the output of ipvsadm -L -n -c on the lvs box. Connection 'b', however, remains ESTABLISHED according to netstat -anp on the real server box. Why is this? Can I force lvs to properly reset the connection to the real server?

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  • Setting alias for DynDNS domain

    - by metalball
    Hey all, I've created DynDNS domain for testing my local sites, and i'm having trouble with pointing to root domain. From my registrar (GoDaddy) I've created a CNAME for www to point my example.dyndns.com so going to url www.example.com I'm reaching my site. But if I'm going to example.com I'm reaching to the IP of the A record. I can't set the IP for the A record to be my IP because I have dynamic IP, and it changes constatly, and I can't point the A record to domain, only IP. When trying to create CNAME record @ to point example.dyndns.com I'm getting error "A record of a different type exists for the hostname @, could not create CNAME" The only record using the '@' host are NS record, which I can't delete, and when tried to set another NS record with @ point to example.dyndns.com, I've lost connection to my site :) So what can I do to get example.com url reach my site? Thanx!

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  • Vim: :silent with makeprg

    - by ash
    I use pylint on .py files for :make in my .vimrc, although any program, pylint or otherwise, applies to this problem. set makeprg=pylint\ --reports=n\ --output-format=parseable\ % When I run :make, I inevitably get the annoying Press ENTER or type command to continue prompt. I know this can be disabled with :silent, but I can't prepend it to the makeprg variable like this, because it throws an error: set makeprg=:silent "pylint\ --reports=n\ --output-format=parseable\ %" If I try to have my own "Silent make command," command Smake silent make The screen goes black after calling it. How would I do it?

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  • RAID Array performance on an HP Proliant ML350 G5 Smart Array E200i

    - by Nate Pinchot
    We have a client who is complaining about performance of an application which utilizes an MS SQL database. They do not believe the performance issues are the fault of the application itself. The Smart Array E200i RAID controller has 128MB cache and we have the cache set to 75% read/25% write. The disk array set to enable write caching. Recently we ran a disk performance test using SQLIO based on this guide. We used a 10 GB file for the test found that the average sequential read rate was ~60 MB/sec (megabytes/sec) and the average random read rate was ~30 MB/sec. Are these numbers on par for what the server should be performing? Better than on par? Horrible? Amazing?

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  • I am unable to find login page for phpmyadmin

    - by Awan
    I was using phpmyadmin(in Wamp) without a password for root. I thought to set a password for root and goto Privileges page and set a password for root. Now whenever I go to localhost/phpmyadmin page it gives me the following error. MySQL said: Documentation #1045 - Access denied for user 'root'@'localhost' (using password: NO) phpMyAdmin tried to connect to the MySQL server, and the server rejected the connection. You should check the host, username and password in your configuration and make sure that they correspond to the information given by the administrator of the MySQL server. I don't know that what is the problem. It is not showing me a login type page to enter a username and password. Any idea that what is the problem ? Thanks

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  • Custom resolution - Windows 7 - no drivers

    - by Vytautas Butkus
    I'm having some problems with my VGA card. When I enable my VGA drivers and boot windows up they crash and I get message that the problem occured with atimdag.sys drivers or smth like that. I'm gettin BSOD all the time, unless I go to control panel and I disable drivers manually. I can live with disabled drivers just fine(I'm already used to it in quite some time) but the annoying problem is my display resolution. I can not set my res to anything higher than 1024x768. I was wondering if it's possible to change resolution to my native displays resolution without drivers? I've been trying to find something that would work w/o drivers, but with no luck(I've found many of solutions how to do it with working drivers, but as you know I can not enable my drivers). So please, maybe someone could help me and tell me how to set custom resolution?

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  • VPN authentication and MAC addresses

    - by zakk
    I have to set up a VPN (various clients connecting to a web service on a server, which is also the VPN server) and I want to make sure that no user will share his/her credentials with third parties. I know that this problem is not solvable completely, but I'd want to set up some additional security checks... Some idea I have: 1) An additional check on MAC address, but... are MAC addresses preserved thru VPN? 2) Some kind of extra identification of the client (User Agent, open ports, I want to make sure that is the very same client I authorized). 3) I would like to avoid commercial solutions like a security token... I realize it would be the perfect solution, but it will be to expensive, I suppose... Do you feel that these options are viable? Do you have any other ideas? Thanks in advance for your replies!

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  • please explain my fio results - is O_SYNC|O_DIRECT misbehaving on linux?

    - by Zoltan
    I'm going mad over figuring out what the problem could be with one of our storage boxes. With a simple fio script I'm testing random writes using bs=1M and direct=1. The SSD is a Samsung 840pro attached to an LSI HBA (3Gbit/s ports). This is the result I'm getting under FreeBSD 9.1: WRITE: io=13169MB, aggrb=224743KB/s, minb=224743KB/s, maxb=224743KB/s, mint=60002msec, maxt=60002msec This is regardless of sync being set to 0 or 1. On linux, this is the result with sync=0: WRITE: io=14828MB, aggrb=253060KB/s, minb=253060KB/s, maxb=253060KB/s, mint=60001msec, maxt=60001msec and with sync=1: WRITE: io=6360.0MB, aggrb=108542KB/s, minb=108542KB/s, maxb=108542KB/s, mint=60001msec, maxt=60001msec My understanding is that since I'm operating on the raw block device, O_SYNC should not make any difference - there's no filesystem, any barrier, anything between the writes and the drive itself. Especially with O_DIRECT|O_SYNC set. Any ideas? For reference, here's the fio script I'm testing with: [global] bs=1M ioengine=sync iodepth=4 size=16g direct=1 runtime=60 filename=/dev/sdh sync=1 [rand-write] rw=randwrite stonewall

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