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• Recommend a free temperature-monitoring utility for cores + video card, on Vista?

  - by smci

  Looking for your recommendations for a free temperature-monitoring utility, for my PC (Core 2) and graphics card for Vista. (Question reposted with the hyperlinks now I have 10 reputation). I don't want all the geeky details, I don't overclock, I don't see the need to mess with my fan speeds or motherboard settings, I just want something fairly basic to help with basic troubleshooting of intermittent overheats on video card and/or mobo: must run on Windows Vista (yes, don't laugh). ideally displays temperature when minimized to toolbar, and/or: automatically alerts me when temperature on either core or the video card exceeds a threshold ideally measures temperature of video card and system as well, not just the cores. HDD temperature is not necessary I think. logging is nice, graphs are also nice portability to Linux and Mac is nice Apparently Everest is the best paid option, but I'm not prepared to spend $40. I found the following free options, but no head-to-head at-a-glance comparison: CoreTemp (only does cores, not video card?) Open Hardware Monitor (nice graphs, displays when minimized to toolbar, no alerts) RealTemp (has alerts, works minimized, lightweight install) HWMonitor (no alerts, CNET: "[free version is] simple but effective") from CPUID CPUCool (not free: 21-day trialware, then $18) SpeedFan from Almico (too geeky, detail overload; CNET: "most users won't be able to make head or tail of the data this utility provides") Motherboard Monitor (CNET: not recommended, requires expert knowledge of your mobo, dangerous) Intel Thermal Analysis Tool (only does cores, not video card? has logging) Useful discussions I found: hardwarecanucks.com , superuser.com 1, 2 , forums.techarena.in (Update: I downloaded Real Temp 3.60 and it meets all my needs, the customizable alert temperature is great. Open Hardware Monitor seems to be the other one that mostly meets my needs, except no alerts; but it is portable. I tried SpeedFan but the interface is very cluttered, too much unnecessary detail (needs a Basic/Advanced mode and a revamp of the interface.) The answer to my underlying issue is nVidia Geforce LE 7500 video card which runs very hot.)

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• Is there a monitoring software suite that will alert me if it has received no activity in a time period?

  - by matt b

  This might be a very basic question, but I am not very familiar with the exact features of Nagios versus Munin versus other monitoring tools. Let's say we have a process that needs to run daily for some very important infrastructure reasons. We've had cases where the process did not run or was otherwise down for a number of days before anyone noticed. I'd like to set up a system that will enable me to easily know when the daily run did not take place for some reason. I can set up this process to send an email on every successful run (or every failed run), but I do not trust that the people receiving this email would notice an absence of an "I'm OK" message. What I am envisioning is some type of "tripwire" service which this V.I.P. (very-important-process) can send a status message to each time it runs, whether successfully or not; and if the "tripwire" service has not received any word from the VIP within a configurable amount of time, it can then send an alert to someone. (The difference between what I envision and the first approach I outlined is a service that sends a message only in abnormal conditions, rather than a service that sends messages each day that the status is normal/OK). Can Nagios be set up to send an alert like this, if it has not heard from a certain service/device/process in N days? Is there another tool out there which does have this feature?

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• Solution to route/proxy SNMP Traps (or Netflow, generic UDP, etc) for network monitoring?

  - by Christopher Cashell

  I'm implementing a network monitoring solution for a very large network (approximately 5000 network devices). We'd like to have all devices on our network send SNMP traps to a single box (technically this will probably be an HA pair of boxes) and then have that box pass the SNMP traps on to the real processing boxes. This will allow us to have multiple back-end boxes handling traps, and to distribute load among those back end boxes. One key feature that we need is the ability to forward the traps to a specific box depending on the source address of the trap. Any suggestions for the best way to handle this? Among the things we've considered are: Using snmptrapd to accept the traps, and have it pass them off to a custom written perl handler script to rewrite the trap and send it to the proper processing box Using some sort of load balancing software running on a Linux box to handle this (having some difficulty finding many load balancing programs that will handle UDP) Using a Load Balancing Appliance (F5, etc) Using IPTables on a Linux box to route the SNMP traps with NATing We've currently implemented and are testing the last solution, with a Linux box with IPTables configured to receive the traps, and then depending on the source address of the trap, rewrite it with a destination nat (DNAT) so the packet gets sent to the proper server. For example: # Range: 10.0.0.0/19 Site: abc01 Destination: foo01 iptables -t nat -A PREROUTING -p udp --dport 162 -s 10.0.0.0/19 -j DNAT --to-destination 10.1.2.3 # Range: 10.0.33.0/21 Site: abc01 Destination: foo01 iptables -t nat -A PREROUTING -p udp --dport 162 -s 10.0.33.0/21 -j DNAT --to-destination 10.1.2.3 # Range: 10.1.0.0/16 Site: xyz01 Destination: bar01 iptables -t nat -A PREROUTING -p udp --dport 162 -s 10.1.0.0/16 -j DNAT --to-destination 10.3.2.1 This should work with excellent efficiency for basic trap routing, but it leaves us completely limited to what we can mach and filter on with IPTables, so we're concerned about flexibility for the future. Another feature that we'd really like, but isn't quite a "must have" is the ability to duplicate or mirror the UDP packets. Being able to take one incoming trap and route it to multiple destinations would be very useful. Has anyone tried any of the possible solutions above for SNMP traps (or Netflow, general UDP, etc) load balancing? Or can anyone think of any other alternatives to solve this?

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• BizTalk Server Monitoring &ndash; SharePoint Web Part

  - by SURESH GIRIRAJAN

  I have been worked with customers using BizTalk as shared infrastructure in the enterprise, where we have two or more BizTalk apps running on it for different Business groups. Also these customers are not using BizTalk ESB portal even though they are using BizTalk ESB exception framework. So main issue with all these Business groups are they don’t have visibility into the BizTalk apps running in prod, even though they are using SCOM and other monitoring stuff in place. So I am trying to address few issues I am going to list below and how I try to mitigate them, first one on the list is how to get visibility into prod, how to provision those access to the BizTalk resources with minimal activity and how can we take advantage of the resources we have today. So I was working on creating REST data services for BizTalk RFID a year ago and available on codeplex. I thought to extend that idea to take advantage of BizTalk Data Services available in codeplex. I extended the BizTalk data services I will upload the updated service soon. So let me start thru how my solution works, so first step I am using the BizTalk data service (REST service) which expose most of the BizTalk artifacts as resources such as Applications, Orchestrations, Send ports, Receive ports, Host instances and In process instances etc. BizTalk Server Monitoring – SharePoint Web Part I am hosting the BizTalk data service in IIS with application pool configured to run under BizTalk administrator credentials. So with this setup I am making the service to make accessible anonymous. Next step of this solution I have created a SharePoint Visual web part which consumes the BizTalk data service and display all the BizTalk Application and Platform settings in read only mode. Even though BizTalk data services offers to browse resources as well perform actions like starting, stopping Orchestrations, Send ports, Receive locations, Host instances etc. Host Instances BizTalk Applications BizTalk Running / Suspended Instances So having this BizTalk Monitoring SharePoint web part, will be added to the SharePoint. This eliminates the need for granting access to the BizTalk users explicitly, so when you have BizTalk contractor or BizTalk application user need to have access to the BizTalk environment all the need is have access to the SharePoint website. You can configure the web part point to different end point based on your environment. I am making this as read only as part of this to make easier for the users and in terms of provisioning. This removes the dependency of BizTalk admin at least for viewing the BizTalk application status and errors etc. If we need to make any changes to the BizTalk application then its application owner responsibility to co-ordinate with BizTalk admins. There are options like BizTalk ESB portal, BizTalk 360 etc… but this one of the approach to reduce number of steps required to give access to BizTalk application users and also to maximize the resource we have in enterprise today. Also you can expose this data service thru Azure Service Bus and access from other apps like mobile devices or create a web site hosted in Azure etc. One last thing I have tested only with BizTalk Server 2010 on x64 VM only, but it should work on other version. I will try to upload the code shortly with instructions how to setup etc.… I welcome thoughts and suggestions… Hope this helps….

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• June 22-24, 2010 in London City Level 400 SQL Server Performance Monitoring & Tuning Workshop

  - by sqlworkshops

  We are organizing the “3 Day Level 400 SQL Server Performance Monitoring & Tuning Workshop” for the 1st time in London City during June 22-24, 2010.Agenda is located @ www.sqlworkshops.com/workshops & you can register @ www.sqlworkshops.com/ruk. Charges: £ 1800 (5% discount for those who register before 21st May, £ 1710).In this 3 Day Level 400 hands-on workshop, unlike short SQLBits sessions, we go deeper on the tuning topics. Not sure if this will be a good use of your time & money? Watch our webcasts @ www.sqlworkshops.com/webcasts.We are trying to balance these commercial offerings with our free community contributions. Financially: These workshops are essential for us to stay in business!Feedback from Finland workshop posted by Jukka, Wärtsilä Oyj on February 23, 2010 to the LinkedIn SQL Server User Group Finland (more feedbacks @ www.sqlworkshops.com/feedbacks):Just want to start this thread and give some feedback on the Workshop that I attended last week at Microsoft.Three days in a row, deep dive into the query optimization and performance monitoring :-) I must say, that the SQL guru Ramesh has all the tricks up in his sleeves.The workshop was very helpful and what's most important: no slide show marathon: samples after samples explained very clearly and with our own class room SQL servers we can try the same stuff while Ramesh typed his own samples.If the workshop will be rearranged, I can most willingly recommend it to anyone who wants to know what's "under the hood" of SQL Server 2008.Once again, thank you Microsoft and Ramesh to make this happen. May the force be with us all :-)Hope to see you @ the Workshop. Feel free to pass on this information to your SQL Server colleagues.-ramesh-www.sqlbits.com/speakers/r_meyyappan/default.aspx

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• IoT end-to-end demo – Remote Monitoring and Service By Harish Doddala

  - by JuergenKress

  Historically, data was generated from predictable sources, stored in storage systems and accessed for further processing. This data was correlated, filtered and analyzed to derive insights and/or drive well constructed processes. There was little ambiguity in the kinds of data, the sources it would originate from and the routes that it would follow. Internet of Things (IoT) creates many opportunities to extract value from data that result in significant improvements across industries such as Automotive, Industrial Manufacturing, Smart Utilities, Oil and Gas, High Tech and Professional Services, etc. This demo showcases how the health of remotely deployed machinery can be monitored to illustrate how data coming from devices can be analyzed in real-time, integrated with back-end systems and visualized to initiate action as may be necessary. Use-case: Remote Service and Maintenance Critical machinery once deployed on the field, is expected to work with minimal failures, while delivering high performance and reliability. In typical remote monitoring and industrial automation scenarios, although many physical objects from machinery to equipment may already be “smart and connected,” they are typically operated in a standalone fashion and not integrated into existing business processes. IoT adds an interesting dynamic to remote monitoring in industrial automation solutions in that it allows equipment to be monitored, upgraded, maintained and serviced in ways not possible before. Read the complete article here. SOA & BPM Partner Community For regular information on Oracle SOA Suite become a member in the SOA & BPM Partner Community for registration please visit www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Facebook Wiki Technorati Tags: IoT,Iot demo,sales,SOA Community,Oracle SOA,Oracle BPM,Community,OPN,Jürgen Kress

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• Partner Webcast – Introducing Oracle Business Activity Monitoring - 18 October 2012

  - by Thanos

  Oracle Business Activity Monitoring (Oracle BAM), a component of both SOA Suite and BPM Suite, is a complete solution for building interactive, real-time dashboards and proactive alerts for monitoring business processes and services. Oracle BAM gives both business executives and operational manager’s timely information to make better business decisions.  A Real-time Business Visibility Solution that allows to monitor business services and processes in the enterprise, to correlate KPIs down to the actual business process themselves, and most important, to change business processes quickly or to take corrective action if the business environment changes. Let us show you how BAM provides a powerful insight, through Real-Time Dashboards, that can be a competitive edge for all your customers. Agenda: Oracle BAM Overview Business Problems New Approach with Oracle BAM 11g Demonstration Summary & Q&A Delivery Format This FREE online LIVE eSeminar will be delivered over the Web. Registrations received less than 24hours prior to start time may not receive confirmation to attend. Duration: 1 hour Register Now Send your questions and migration/upgrade requests [email protected] Visit regularly our ISV Migration Center blog or Follow us @oracleimc to learn more on Oracle Technologies, upcoming partner webcasts and events. All content is made available through our YouTube - SlideShare - Oracle Mix.

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• Simple monitoring of a Raspberry Pi powered screen - Part 2

  - by Chris Houston

  If you have read my previous blog post Raspberry Pi entrance signed backed by Umbraco - Part 1 which describes how we used a Raspberry Pi to drive an Entrance sign for QV Offices you will have seen I mentioned a follow up post about monitoring the sign.As the sign is mounted in the entrance of the building on the ground floor and the reception is on the 1st floor, this meant that if there was a fault of any kind showing on the screen, the first person to see this was inevitably one of QV Offices' clients as they walked into the building.Although the QV Offices' team were able to check the Umbraco website address that the sign uses, this did not always mean that everything was working as expected. We noticed a couple of times that the sign had Wifi issues (it is now hard wired) and this caused the Chromium browser to render a 404 error when it tried to refresh the screen.The simple monitoring solutionWe added the following line to our refresh script, so that after the sign had been refreshed a screen shot of the Raspberry Pi would be taken:import -display :0 -window root ~/screenshot.jpgFinally we wrote a small Crontab task that ran on a QV Offices Mac that grabs this screen shot and saved it on the desktop, admittedly we have used a package that it not mega secure, but in reality this is an internal system that only runs an office sign, so we are not to concerned about it being hacked.*/5 * * * * /usr/local/bin/sshpass -p 'password' /usr/bin/scp [email protected]:screenshot.jpg Desktop/QVScreenShot.jpgAs the file icon updates, if the image changes, this gives a quick visual indication of the status of the sign, if for some reason the icon does not look correct the QV Offices administrator can just click on the file to see the exact image currently displayed on the sign.Sometimes a quick and easy solution is better than a more complex and expensive one.

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• Good practice or service for monitoring unhandled application errors for a small organization

  - by palto

  I'm working with multiple software with varying ways of monitoring for errors. When I make software, I usually send email with the stack trace to admins(usually me). Some customer software is monitored by a team who check that a particular batch run was successfull. Other software might not have any monitoring at all(someone will call when things go wrong horribly). Sending emails is good, except when things start going wrong, my mail gets filled fast. Also I don't want to solve the same problem in code for every software. Is there some relatively cheap and low maintenance software or practice to handle this. I want it to be cheap/low maintenance because usually I work alone or in teams of 5 or smaller. For example it would be great if errors would be aggregated so I don't get 10 000 emails when something unexpected happens... For clarification: By unhandled errors I mean Exceptions that were unhandled by application code that were propagated to Tomcat or Jboss. I don't need help with how to catch those errors. I need help with what to do with them. Is there any cloud application that I could send my errors to? Or some simple server to install? Or some library that can handle errors using configuration files. I use Java if that is any help.

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• Dynamic Monitoring Service (DMS) Configuration Dumping and CPU Utilization

  - by ShawnBailey

  There was recently a report of CPU spikes on a system that were occuring at precise 3 hour intervals. Research revealed that the spikes were the result of the Dynamic Monitoring Service generating a metrics dump and writing it under the server 'logs' folder for every WLS server in the domain. This blog provides some information on what this is for and how to control it. The Dynamic Monitoring Service is a facility in FMw (JRF to be more precise) that collects runtime data on the components deployed to WebLogic. Each component is responsible for how much or how little they use the service and SOA collects a fair amount of information. To view what is collected on any running server you can use the following URL, http://host:port/dms/Spy and login with admin credentials. DMS is essentially always running and collecting this information in the runtime and to protect against loss of this data it also runs automatic backups, by default at the 3 hour interval mentioned above. Most of the management options for DMS are exposed through WLST but these settings are not so we must open the dms_config.xml file which can be found in DOMAIN_HOME/config/fmwconfig/servers/<server_name>/dms_config.xml. The contents are fairly short and at the bottom you will find the following entry: <dumpConfiguration>     <dump intervalSeconds="10800" maxSizeMBytes="75" enabled="true"/> </dumpConfiguration> The interval of 10800 seconds corresponds to the 3 hours and the maximum size is 75MB. The file is written as an archive to DOMAIN_HOME/servers/<server_name>/logs/metrics. This archive contains the dump in XML format. You can disable the dumps all together by simply setting the 'enabled' value to 'false' or of course you could modify the other parameters to suit your needs. Disabling the dumps will NOT impact DMS collections or display at runtime. It will only eliminate these periodic backups.

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• Ubuntu 12.04 Install - Black Screen - No Grub - Have run Boot Repair Disk

  - by Pat

  Day 4 of my purgatory. History: Had problems with live CD at first, had to set the "nomodeset" option ... and then it worked fine. Installed Ubuntu "Alongside" Windows XP from live CD (NOT wubi) Upon reboot after installation, I get the BIOS ... and then a black screen. If I hit shift after the BIOS screen I get text that says "loading GRUB ..", but then no GRUB ... just a black screen. What I have tried to do: Total re-installation ... 3 times now. Also tried with wubi, same black screen. Have gone back to the normal (non-wubi) install. After installation, I tried re-booting the live cd ... and trying to change GRUB file using: sudo gedit /etc/default/grub ... to "nomodeset" and "timeout=10" ... but won't let me save my changes because I'm using the live cd "in memory" system and don't have permissions to the disks (I think). I tried logging in ... but it won't let me. I then read many posts on this site. I'm stuck. This morning, I ran the "boot repair disk". Results here: http://paste.ubuntu.com/1132333/ What I think is wrong: Since I can get the live CD to run (perfectly) with the "nomodeset" option, I think all I need to do is get to GRUB to change that ... but I can't get to GRUB. Appreciate any advice. Pat Day 5 ... I downloaded "Super Grub 2 Disk" from: http://www.supergrubdisk.org/super-grub2-disk/ This looks promising. I can boot the disk and it brings me to a GRUB program that allows me to: 1) Boot to Windows ... which works 2) Boot to Ubuntu ... which does NOT work When I choose boot to Ubuntu, I get lines across the screen which is an obvious video card problem. Likely because I need to set the "nomodeset" option. So, I attempted to use super grub2 to edit the grub file ... but it is TOTALLY different than the Ubuntu grub file ... and I don't know where to put the "nomodeset" option. Still stuck ... The bottom line is that: 1) I need to edit /etc/default/grub on sda(1) ... which is my boot drive ... to add the "nomodeset" option 2) To do that I need to get into grub ... but, I can't. Holding down shift just echo's "loading grub .." and then takes me to a black screen 3) I can boot to the live CD by setting nomodeset .... but I cannot access the hard disk as root ... I can't save my changes! Can anyone tell me how to login as root for the filesystem from the live CD ... so I can edit the grub file on the HARD DISK ... and then run update-grub??

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• Disk IO profiler for existing applications

  - by stacker

  I need to know what file a specific program read. (this specific program is based on .net). Is there a recommendation for a good profiler?

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• Disk IO Performance Limitations based on numbers of folders/files

  - by Josh

  I have an application where users are allowed to upload images to the server. Our Web Server is a windows 2008 server and we have a site (images.mysite.com) that points to a shared drive on a unix box. The code used to do the uploading is C# 3.5. The system currently supports a workflow where after a threshold is met a new subfolder can be generated. The question we have is how many files and/or subfolders can you have in a single folder before there is a degredation in performance - in serving the images up through IIS 7 and reading/writing through code?

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• Dell 2950 Perc 6/i "physical disk" and "Enclosure(Backplane)" under Connector 1 in OMSA tree- Troubleshoot help

  - by user66357

  Just looking for someone who might know why this could occur... In OMSA, on my Dell 2950, there usually is only one "Physical Disks" child under "Enclosure (Backplane)" in the tree view. Currently, the tree looks like this: Dell PERC 6/i Integrated Connector 1 (RAID) Enclosure (Backplane) Physical Disks (1:04 good, 1:05 removed) Physical Disks (1:33 Ready but unused) Normally it's like this: Connector 1 (RAID) Enclosure (Backplane) Physical Disks (1:04 good, 1:05 good) From the front, 6 of 6 3.5" SAS drives are connected. The server is showing Slot 5 as bad and the disk as removed. It seems that the drive in Slot 5 is being sensed as external to the Enclosure. Any ideas why this would happen? Think I can get away with rebuilding the virtual disk by replacing 1:05 with 1:33? Thanks. UPDATE: The only options on the Physical Disk 1:33 were Assign as Global Hot Spare and Clear... After clearing, I assigned it as the Global Hot Spare. This allowed the rebuilding of the virtual disk. Hopefully it won't fail. I'm still unsure of the reason for this odd behavior. I'm checking the firmware next.

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• Mysql: Disk is full writing

  - by elma

  Hi there, I'm having some problems with my mysql server lately, so I've decided to check the error logs: [root@LSN-D1179 log]# tail -10 mysqld.log 100325 19:30:03 [ERROR] /usr/libexec/mysqld: Table './lfe/actions' is marked as crashed and should be repaired 100325 19:30:03 [ERROR] /usr/libexec/mysqld: Table './lfe/actions' is marked as crashed and should be repaired 100325 19:30:18 [ERROR] /usr/libexec/mysqld: Disk is full writing './omuz/ibf_task_logs.MYD' (Errcode: 122). Waiting for someone to free space... Retry in 60 secs 100325 19:34:34 [ERROR] /usr/libexec/mysqld: Disk is full writing './omuz/ibf_profile_portal_views.MYD' (Errcode: 122). Waiting for someone to free space... Retry in 60 secs 100325 19:39:46 [ERROR] /usr/libexec/mysqld: Disk is full writing './omuz/ibf_posts.TMD' (Errcode: 122). Waiting for someone to free space... Retry in 60 secs 100325 19:40:18 [ERROR] /usr/libexec/mysqld: Disk is full writing './omuz/ibf_task_logs.MYD' (Errcode: 122). Waiting for someone to free space... Retry in 60 secs 100325 19:44:34 [ERROR] /usr/libexec/mysqld: Disk is full writing './omuz/ibf_profile_portal_views.MYD' (Errcode: 122). Waiting for someone to free space... Retry in 60 secs 100325 19:49:46 [ERROR] /usr/libexec/mysqld: Disk is full writing './omuz/ibf_posts.TMD' (Errcode: 122). Waiting for someone to free space... Retry in 60 secs 100325 19:50:18 [ERROR] /usr/libexec/mysqld: Disk is full writing './omuz/ibf_task_logs.MYD' (Errcode: 122). Waiting for someone to free space... Retry in 60 secs 100325 19:54:34 [ERROR] /usr/libexec/mysqld: Disk is full writing './omuz/ibf_profile_portal_views.MYD' (Errcode: 122). Waiting for someone to free space... Retry in 60 secs And here's is my df -h output [root@LSN-D1179 log]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00 143G 6.2G 129G 5% / /dev/sda1 99M 12M 83M 13% /boot tmpfs 490M 0 490M 0% /dev/shm As you can see, I have plenty of free space; so I couldn't figure out these "Disk is full" errors in mysqld.log. Does anyone know what should I do to fix this? Ugur

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• Full disk encryption with seperate boot and encrypted keyfile storage: Two-Form Authentication

  - by Cain

  I am trying to setup true Full Disk encryption with two-form authentication on 12.04 and can not find out how to call a keyfile for the encrypted root out of another encrypted partition. All documentation or questions I am finding for whole or full disk encryption only encrypts separate partitions on the same disk. This is not what most are calling full disk encryption, /boot is not on a partition on the root drive, rather it is on a usb stick as sdx1. Instead root is on a logical partition on top of a LUKS container. Luks is run on the whole disk, encrypting the partition table as well. All drives in the machine are completely encrypted and to open it it requires a USB drive (what I have) as well as a passphrase (what I know) resulting in Two-Form Authentication to boot the machine. Device sdx cryptroot vg00 lvroot / There is no passphrase to open the encrypted root device, only a keyfile. That keyfile is kept on the usb drive with /boot, in its own encrypted partition (I'll call this cryptkey). In order for the root file system (cryptroot) to be opened, initramfs must ask for the passphrase to cryptkey on the usb drive, then use the keyfile inside that to open cryproot. I did manage to find what I think is the how-to I used to do this once before: http://wiki.ubuntu.org.cn/UbuntuHelp:FeistyLUKSTwoFormFactor I already have the system installed and can chroot into it, however, I can not get it to call for the keys on the USB during boot. I did find a how-to saying I needed to make a cryptroot conf for initramfs but, I believe that is for a passphrase: https://help.ubuntu.com/community/EncryptedFilesystemLVMHowto#Notes_for_making_it_work_in_Ubuntu_12.04_.22Precise_Pangolin.22_amd64 I also tried to setup crypttab. However, crypttab only works for drives mounted after the root drive as calling for a keyfile on a device not yet mounted to the system doesnt work. The Feisty how-to included scripts that would be run during boot instructing initramfs to mount the usb drive temporarily and call the keyfile for root which worked quite well except those scripts are outdated now, many of the things they relied on have been merged into something else, changed, or simply don't exist anymore. If I have missed a clear how-to for this, that would be wonderful, I just don't think I have.

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• How to keep subtree removal (`rm -rf`) from starving other processes for Disk I/O?

  - by David Eyk

  We have a very large (multi-GB) Nginx cache directory for a busy site, which we occasionally need to clear all at once. I've solved this in the past by moving the cache folder to a new path, making a new cache folder at the old path, and then rm -rfing the old cache folder. Lately, however, when I need to clear the cache on a busy morning, the I/O from rm -rf is starving my server processes of disk access, as both Nginx and the server it fronts for are read-intensive. I can watch the load average climb while the CPUs sit idle and rm -rf takes 98-99% of Disk IO in iotop. I've tried ionice -c 3 when invoking rm, but it seems to have no appreciable effect on the observed behavior. Is there any way to tame rm -rf to share the disk more? Do I need to use a different technique that will take its cues from ionice? Update: The filesystem in question is an AWS EC2 instance store (the primary disk is EBS). The /etc/fstab entry looks like this: /dev/xvdb /mnt auto defaults,nobootwait,comment=cloudconfig 0 2

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• Disk doesn't contain a valid partition table

  - by Jeevan Dongre

  I was running a m1.small instance ec2 ubuntu instance. I was running out of disk space, so I upgraded my instance to medium. When I upgraded I actually got 429.5 GB of space and after that I added 10 gb of volume too. When I run the "sudo fdisk -l" command I got this results. Disk /dev/sda1: 8589 MB, 8589934592 bytes 255 heads, 63 sectors/track, 1044 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/sda1 doesn't contain a valid partition table Disk /dev/sda2: 429.5 GB, 429461078016 bytes 255 heads, 63 sectors/track, 52212 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/sda2 doesn't contain a valid partition table Disk /dev/sdf: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 sda1 is the primary parition and sda2 is what I got added upgrading my system to medium. But the problem persists, I am not able to pull the code from git, it is giving me this error. remote: Counting objects: 409, done. remote: Compressing objects: 100% (236/236), done. fatal: write error: No space left on device fatal: index-pack failed

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• disk partition centos

  - by FlourishDNA

  I am setting up server for hosting two WordPress which has size of around 70GB. I have already installed CentOS as OS and I would like to partition the Disk. Is there any tool which can help me or can someone guide me though the process as I am not expert is SSH commands. Here are some output that might help. OS: CentOS release 6.3 fdisk -l Disk /dev/xvdb: 214.7 GB, 214748364800 bytes 255 heads, 63 sectors/track, 26108 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000b91e0 Device Boot Start End Blocks Id System Disk /dev/xvda: 21.5 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000e542c Device Boot Start End Blocks Id System /dev/xvda1 * 1 64 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/xvda2 64 2611 20458496 8e Linux LVM Disk /dev/mapper/vg_flourish-lv_root: 16.7 GB, 16718495744 bytes 255 heads, 63 sectors/track, 2032 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/vg_flourish-lv_swap: 4227 MB, 4227858432 bytes 255 heads, 63 sectors/track, 514 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 df Filesystem 1K-blocks Used Available Use% Mounted on /dev/mapper/vg_flourish-lv_root 16070076 758184 14495560 5% / tmpfs 958500 0 958500 0% /dev/shm /dev/xvda1 495844 31926 438318 7% /boot df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_flourish-lv_root 16G 741M 14G 5% / tmpfs 937M 0 937M 0% /dev/shm /dev/xvda1 485M 32M 429M 7% /boot Thanks

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• Damaged external NTFS hard disk

  - by Thanos

  A few days ago, I used my external hard disk (a 2TB Seagate) in order to transfer some files on Windows Vista. During that, I noticed some malfunctions on my system (it was running too slow, Windows Explorer crashed). When Explorer crashed, file transportation stopped. I was afraid, but I tried to access my files and it seemed to be working. I tried to open a movie (from the external disk) but it couldn't load. I thought of restarting, but this took sooo long... So I unplugged the hard disk and at that time it managed to shut down. I logged on to Windows Vista but the hard disk couldn't be mounted. I plugged it but nothing happened. I unplugged it and I heard this specific sound that notifies that something has been unplugged. I thought of logging to Ubuntu 10.04 and see what I can do. I plugged the hard disk, but I couldn't see it. I opened GParted but I couldn't see it either. I tried with Disc Utility and there it was! I tried to mount it but a got an error message stating that an error occured with Windows, there is a file (0,0) that has problem or something like that. It suggested to log into Windows and run chkdsk /f and reboot twice. The thing is that I am somehow afraid to do so because I don't really know the impact on that. Plus I don't trust doing even a check on Vista... I finally risked it and I typed chkdsk/f on a cmd. I cannot, however, actually run it because I don't have admin privileges. So from search I found chkdsk, I right cliked and selected “run as administrator”. It run but I got a message like NTFS file system. It should check at the coming restart. At that point I am mistaken. I thought that f meant F but this is not the case here... Does anyone have any suggestions and advice?

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• Linux Disk Setup for VMs

  - by zjherner

  Been trying to find the ideal way to setup disks/partitions for Linux guests on ESXi. Seems as though Linux is falling behind when it comes easily adding disk space. The end goal is to be able to add disk space to a Linux server without rebooting the server or taking the server offline. Ideally, I would expect adding disk to a Linux machine should be as easy as adding disk space to a Windows machine. I expand the vmdk file from vSphere Open disk mangler find the disk and extend volume. Would have to use command line tools in linux which is no big deal, but I haven't been able to find a solid way to exand filesystems on the fly. What is everyone else using for disk setups on their linux guests? Has anyone been able to acheive adding storage space to linux without downtime? Can it be done without using lvm?

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• Need data on disk drive management by OS: getting base I/O unit size, "sync" option, Direct Memory A

  - by Richard T

  Hello All, I want to ensure I have done all I can to configure a system's disks for serious database use. The three areas I know of (any others?) to be concerned about are: I/O size: the database engine and disk's native size should either match, or the database's native I/O size should be a multiple of the disk's native I/O size. Disks that are capable of Direct Memory Access (eg. IDE) should be configured for it. When a disk says it has written data persistently, it must be so! No keeping it in cache and lying about it. I have been looking for information on how to ensure these are so for CENTOS and Ubuntu, but can't seem to find anything at all! I want to be able to check these things and change them if needed. Any and all input appreciated.

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• Need data on disk drive management by OS: getting base I/O unit size, “sync” option, Direct Memory A

  - by Richard T

  Hello All, I want to ensure I have done all I can to configure a system's disks for serious database use. The three areas I know of (any others?) to be concerned about are: I/O size: the database engine and disk's native size should either match, or the database's native I/O size should be a multiple of the disk's native I/O size. Disks that are capable of Direct Memory Access (eg. IDE) should be configured for it. When a disk says it has written data persistently, it must be so! No keeping it in cache and lying about it. I have been looking for information on how to ensure these are so for CENTOS and Ubuntu, but can't seem to find anything at all! I want to be able to check these things and change them if needed. Any and all input appreciated.

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• Installed on a machine with EFI and after installation, it says the disk is not bootable

  - by Roy Hocknull

  I installed Ubuntu 11.10 and the installation runs through fine. It then says reboot, and the machine says 'inserts a boot disk' which means the hard disk isn't bootable. The primary hard disk is an EFI device, and nothing seems to work. The machine in question is an Acer Aspire M3970 desktop. Core i5 2300, with 8Gb Ram. Main boot drive is an SSD (Vertex 2E 60Gb). I am trying to install the 11.10 x64 version. The installation I have tried from CD and USB stick. It goes through the install, allows you to partition the drives then installs all the packages. At the end it goes for a reboot, and asks you to remove the installation media. The PC then restarts and says no bootable disk. I tried it many times. In the end I have installed Fedora 15 x64 which works straight away with no messing. Unless this issues is fixed I have to drop 11.10 as a viable option. From my experience F15 isn't quite as polished as Ubuntu, but in this case - it works!! Is this a widespread problem or am I unique?

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• Creating properly aligned partitions on a replacement disk

  - by Marius Gedminas

  I've a typical small office server with two hard disks configured for RAID-1 (mirroring). Each disk has several partitions: one for swap, the others paired in several /dev/mdX arrays. Every couple of years one of the disks dies and is replaced. The replacement typically goes something like this: # copy partition table from the remaining good disk to the empty replacement disk # (instead of /dev/good_disk and /dev/new_disk I use /dev/sda and /dev/sdb, as appropriate) sfdisk -d /dev/good_disk | sfdisk /dev/new_disk # install boot loader grub-install /dev/new_disk # create swap partition reusing the same UUID, so I don't need to edit /etc/fstab mkswap /dev/new_disk1 -U xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx # hot-add the new partitions to my RAID arrays mdadm /dev/md0 -a /dev/new_disk2 mdadm /dev/md1 -a /dev/new_disk5 mdadm /dev/md2 -a /dev/new_disk6 mdadm /dev/md3 -a /dev/new_disk7 mdadm /dev/md4 -a /dev/new_disk8 The disks were originally partitioned with cfdisk back in 2009, and so the partition table is aligned traditionally to cylinder boundaries (255 heads * 63 sectors). This is not the optimum configuration for new 4K-sector drives. My question is: how can I create a set of partitions for the new disk and ensure they're properly aligned, and have correct sizes for my RAID arrays (rounding up is acceptable, I suppose, but rounding down is definitely not)?

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