I came across this handy page which details LUN alignment offset via fdisk:
Apparently this comes in handy when working with EMC Clarriions.
I came across this handy page which details LUN alignment offset via fdisk:
Apparently this comes in handy when working with EMC Clarriions.
While attempting to dump some photos from my newly acquired Sony Cybershot camera onto a Fedora 9 workstation, I had to switch to “Mass Storage” mode on the camera before I was able to mount the volume.
When I inserted the USB cable into my camera and turned it on, the dmesg output was as follows:
usb 1-6: new high speed USB device using ehci_hcd and address 3 usb 1-6: configuration #1 chosen from 2 choices usb 1-6: New USB device found, idVendor=054c, idProduct=0010 usb 1-6: New USB device strings: Mfr=1, Product=2, SerialNumber=0 usb 1-6: Product: Sony DSC usb 1-6: Manufacturer: Sony
I saw an Ubuntu forum note about switching to PTP mode, but that did not work for me, only returning the following:
usb 1-6: new high speed USB device using ehci_hcd and address 4 usb 1-6: configuration #1 chosen from 1 choice usb 1-6: New USB device found, idVendor=054c, idProduct=004e usb 1-6: New USB device strings: Mfr=1, Product=2, SerialNumber=0 usb 1-6: Product: Sony PTP usb 1-6: Manufacturer: Sony
After I switched to “Mass Storage” mode, I see the following output:
Initializing USB Mass Storage driver... scsi4 : SCSI emulation for USB Mass Storage devices usbcore: registered new interface driver usb-storage USB Mass Storage support registered. usb-storage: device found at 6 usb-storage: waiting for device to settle before scanning usb-storage: device scan complete scsi 4:0:0:0: Direct-Access Sony Sony DSC 6.00 PQ: 0 ANSI: 0 CCS sd 4:0:0:0: [sdb] 3962880 512-byte hardware sectors (2029 MB) sd 4:0:0:0: [sdb] Write Protect is off sd 4:0:0:0: [sdb] Mode Sense: 00 00 00 00 sd 4:0:0:0: [sdb] Assuming drive cache: write through sd 4:0:0:0: [sdb] 3962880 512-byte hardware sectors (2029 MB) sd 4:0:0:0: [sdb] Write Protect is off sd 4:0:0:0: [sdb] Mode Sense: 00 00 00 00 sd 4:0:0:0: [sdb] Assuming drive cache: write through sdb: sdb1 sd 4:0:0:0: [sdb] Attached SCSI removable disk sd 4:0:0:0: Attached scsi generic sg2 type 0
I was then able to mount the volume (was already mounted to /media/disk) and copy my pictures from the device.
$ lsusb Bus 001 Device 006: ID 054c:0010 Sony Corp. DSC-S30/S70/S75/F505V/F505/FD92/W1 Cybershot/Mavica Digital Camera Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 002: ID 0a81:0205 Chesen Electronics Corp. PS/2 Keyboard+Mouse Adapter Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
I’ve recently had to learn a lot about MySQL and how to manage it effectively, especially after it has not been managed very well for a long time. As a Linux Administrator I’ve had the opportunity to use MySQL in many roles over the years but never at an enterprise level. I’m still learning and trying things out, but so far here are some guidelines:
If you find that after deleting data from a table you have performance issues, look at running optimize on your MyISAM tables and check for locks using ‘show processlist’.
I don’t know if converting to InnoDB will help in situations with large data sets where table maintenance is not performed regularly, but time will tell. I am skeptical that the performance on an InnoDB table will be there with large data sets as well.
I find that as an open source advocate, without knowing these things, it’s very difficult to make an argument for open source solutions when there are SQL Server advocates around calling the architecture shots.
Something that I need to do frequently is to set some text to lowercase in vi which is currently in mixed or upper case. A quick way to do this is:
:1s/\(.*\)/\L\1/
The above command acts on line 1 in the file, takes the entire line, enclosed in parentheses to create a group, then uses \L to specify lowercase on the entire line \1 that was previously matched.
Tuesday a vulnerability was made public which affects all users of the DNS system. The vulnerability was discovered by Dan Kaminsky, a prominent researcher in the area of DNS, who organized a mass patch release by major vendors to prevent delays between the vulnerability becoming public and the patch being released.
http://doxpara.com/
This is a critical fix that should be applied ASAP to all DNS servers, regardless of vendor.
Firefox 3 has been released!
I have been using this version for nearly one full day now and it’s great. I was disappointed when I loaded up all of my tabs and I normally just log out of my X session or Windows session to allow the handy crash recovery to recover all of my lost tabs on subsequent restart when, much to my dismay, it did not recover them. I had to explicitly specify through the options menu to revert to the previous set of tabs and windows on restart.
There are a lot of discussions going on recently with regard to ‘Net Neutrality’. When I think of the subject, I typically think of my evil ISP blocking or restricting my traffic and/or giving preference to web sites that they want me to see. I also think of the government blocking my traffic to certain sites like the great firewall of China.
I read an interesting article written by Richard Bennet where he talks about how the government should stay out of these discussions, letting engineers handle the engineering task of dictating how traffic should be controlled.
Well worth the read.
http://www.circleid.com/posts/86147_net_neutrality_innovation_081/
Welcome to my blog!
The purpose of this blog is to share my thoughts of technical topics related to Linux, authentication, security, and other random topics.