MIT creates diode for light, makes photonic silicon chips possible

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In the near term, though, garnet-on-silicon chips are likely to be used in networking — first in backbone routers, which are physically huge and very power hungry because of the current size of optical switching hardware, and then hopefully at home and in the office (100Gbps home networks!) Then, once the size of MIT’s diode for light is scaled down — it’s currently around 400nm long, some 20 times larger than a transistor — we might begin to see photonic circuits in computers.

via MIT creates diode for light, makes photonic silicon chips possible | ExtremeTech.

Welcome to EquusCS.com

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Equus is proud to be one of America’s largest computing system manufacturers.  Since 1989, Equus has delivered more than three million build-to-order and ready-to-ship computing systems. Equus has prospered because of its ability to boost efficiencies, adopt the latest technology, leverage its global suppliers, and provide the highest quality solutions with loyal service and support.

Via Welcome to EquusCS.com.

They build custom systems.

The Top 10 Supercomputers, Illustrated, Nov. 2011

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The Top 10 Supercomputers, Illustrated, Nov. 2011 » Data Center Knowledge.

The twice-a-year list of the Top 500 supercomputers documents the most powerful systems on the planet. Many of these supercomputers are striking not just for their processing power, but for their design and appearance as well. Here’s a look at the top finishers in the latest Top 500 list, which was released Monday, November 15, 2011 at the SC11 conference in Seattle.

Super computer porn.

scanning for new scsi devices

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scanning for new scsi devices.

New devices can be added using echo “scsi add-single-device <h> <b> <t> <l>” > /proc/scsi/scsi where the variables are host, bus (channel), target (scsi id) and lun. The success (or otherwise) of this command can be determined by sending a subsequent cat /proc/scsi/scsi command.

..from the scsi-howto (proc interface) at www.tldp.org – see it for more info.

i have a script “rescan-scsi-bus.sh” here on debian which uses the above method to recheck devices.

HTH ritch.

This was written in 2005. I found the rescan-scsi-bus.sh script on medusa but have no idea which package it came from. It wasn’t on any other Fedora 14 install so it must have come from somewhere. It scans the SCSI bus and finds the drive perfectly well.

Re-scan the SCSI bus in Linux after hot-swapping a drive

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A better way to find out the correct host controller:

# udevadm info -a -p /sys/class/scsi_generic/sg0

where sg0 is the device node of which you’d like to know the corresponding SCSI controller – down that tree you will find hostX mentioned as part of the device path.

And thanks for the rescanning tip, it saved my day.

via Re-scan the SCSI bus in Linux after hot-swapping a drive | Racker Hacker.

Portable software for USB, portable and cloud drives

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PortableApps.com is the world’s most popular portable software solution allowing you to take your favorite software with you. A fully open source and free platform, it works on any portable storage device (USB flash drive, iPod, memory card, portable hard drive, etc) as well as local storage and cloud storage options. With millions of users all over the world and a full collection of open source software as well as compatible freeware and commercial software and partners in the software and hardware industry, PortableApps.com is the most complete solution for life on the go.

PortableApps.com – Portable software for USB, portable and cloud drives.