Getting linux to scan for a new drive without rebooting is as simple as:
echo "- - -" > /sys/class/scsi_host/host0/scan
Assuming of course that the drive is attached to host0, otherwise choose the host that is appropriate for your situation…
After scanning you should be able to see the new drive by running:
After which you can do your normal partitioning, formatting and mounting of the new drive.
The good folks an RAVPower sent me one of their RAVPower Luster 3000mAh external batteries, and I have to say that their timing could not have been better. For me, the idea of an external battery is for emergencies. Like when you find yourself with out your normal charger, on a longer then expected road trip.
And this is exactly what happened to me. I left for the weekend to visit my in-laws with my wife and two of our children, and had the RAVPower with me to test, so I purposely ignored my normal charging schedule to see how well this thing performed. I had consistently experienced about 1 and a half full charges while on our trip, which was awesome for such a small package.
However this is where this amazing $19.99 beauty really shined. On my my way back home Sunday night I was rear-ended by some idiot going at least 100mph (While I was going 65mph, which was like a 35mph rear ender). The good news is that nobody was hurt, but all my electronics were in the trunk, which was completely destroyed, and of course my phone battery was low. The built in flashlight on the battery was invaluable for making sure my family was fine, checking out the damage, and it kept my phone running long enough to call 911 and the tow truck. and when it was all over, the phone was even completely charged!
Personally I think everybody should get the RAVPower 3000mWh battery and much of my family will probably get one for birthdays and such.
I loved flying the Parrot AR Drone with my iPhone or iPad Air. I didn’t love the $299 price tag, although I’ll admit, it’s probably worth it since it’s so much fun. A remote flying machine doesn’t have to cost that much though, and clearly there’s demand for low-cost alternatives. The latest, PowerUp 3.0, is about to finish up its Kickstarter funding where it flew past its $50,000 goal with nearly $1.2 million raised.
via Why buy a drone when this $30 Bluetooth chip can make your paper airplane fly? — Tech News and Analysis.
I have long been a fan tracking failure rates, and when a company like Backblaze publishes their drive statistics my ears seriously perk up. After all, 25,000 drives is a pretty decent pool to pull performance stats from, and they are sharing!
Because Backblaze has a history of openness, many readers expected more details in my previous posts. They asked what drive models work best and which last the longest. Given our experience with over 25,000 drives, they asked which ones are good enough that we would buy them again. In this post, I’ll answer those questions.
via Backblaze Blog » What Hard Drive Should I Buy?.
How long do disk drives last? The short answer is: we don’t know yet, but it’s longer than you might guess.
Why does a company that keeps more than 25,000 disk drives spinning all the time not know how long they last? Backblaze has been providing reliable and unlimited online backup for over five years. For the past four years, we’ve had enough drives to provide good statistics, but 74% 78% of the drives we buy are living longer than four years. So while 26% 22% of drives fail in their first four years, and we have detailed information about the failure rates of drives in their first four years, we don’t yet know what will happen beyond that. So how long do drives last? Keep reading.
via Backblaze Blog » How long do disk drives last?.
Bza.biz can craft jewelry in the shape of the sound waves of a recording you send them. They offer a variety of different materials; plywood, black plywood, white, blue or “radiant” acrylic. Even silver.The plywood and acrylic are discs that are strung in the shape of the sound. Or, if you don’t like that idea, you can have it cast in silver as either earrings or a keychain.
via This Soundwave Jewelry Lets You Speak Without Saying A Word.
External battery packs are one of the most useful types of accessories you can own. They are endlessly convenient when you’re not near your phone or tablet charger and also great for emergency or power outage situations. The Limefuel Blast L60X is one of the more modest entries into this category, with a pocketable form factor and a sleek design, but it’s also one of the easiest to recommend.
via The Limefuel Blast L60X external battery pack is power in your pocket | TUAW – The Unofficial Apple Weblog.
NEW PRODUCT – BMP180 Barometric Pressure/Temperature/Altitude Sensor- 5V ready – This precision sensor from Bosch is the best low-cost sensing solution for measuring barometric pressure and temperature. Because pressure changes with altitude you can also use it as an altimeter! The sensor is soldered onto a PCB with a 3.3V regulator, I2C level shifter and pull-up resistors on the I2C pins.
I have been looking for an alternative to Droplr that has the screen shot sharing functionality, but uses a local server that can be inside our firewalls to store the screen shots on.
I just rebuilt a Centos box with over 20 1.5 terabyte drives, that suffered a fan failure causing many of the drives to cook themselves into oblivion. When I started the job I realized that my more advanced storage admin skills were a bit rusty so I decided that I should post a bit about this in order to burn it back into my memory.
I needed to create a storage pool of at least 12 terabytes and wanted it to be fairly fast and safer then RAID 5. The best solution with what I had to work with was two RAID 1+0 arrays and LVM to span them.
If you are going to create a volume of this size be prepared for many hours of waiting and just to be safe you should have screen installed and running in your terminal, just in case…
First step is to create a primary partition on each drive using fdisk. For my arrays I created a single partition on each drive that used all the available space and set the type to fd (linux raid partition)
Second step was to create the arrays using mdadm
mdadm -v –create /dev/md2 –level=raid10 –raid-devices=10 /dev/sdc1 /dev/sdd1 /dev/sde1 /dev/sdf1 /dev/sdg1 /dev/sdh1 /dev/sdi1 /dev/sdj1 /dev/sdk1 /dev/sdl1