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Status of my Work with GCC
by Nicholas Krause 06 Jan '20

06 Jan '20

Greetings All, I've sure some of you are aware of my work with the GCC folks but if not I've coordinating and figuring out how to scale/implement multi-threading in GCC to support it. In addition I've in contact with the LLVM side to see if there interested as well. I may be at the next meeting as I believe some of had unanswered questions about a) my work or b) compilers in general. My wiki article will be posted soon after I do final edits and heard back from some people, Nick P.S. I'm attaching a rather rough draft as I've rereading it carefully for grammar and issues but if people want to read it earlier that's fine with me. The ideas and writing may change but its a earlier draft.

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Remove drive, system won't boot
by Evan Leibovitch 04 Jan '20

04 Jan '20

Hi again, Sorry for two system problems over the holidays, but this last one truly has me stumped. Last week I had a problem trying to back up files onto a large drive using a USB enclosure. This week I've tried to complete the install, and of course it could not go without problems.... The config is: SDD with /boot and / HDD1 with /var, /home and swap HDD2 has one data partition HDD3 has one data partition I am trying to replace HDD2 with HDD3. HDD3 installs and mounts just fine. But if I unplug HDD2, the machine refuses to boot. Taking it to recovery mode eventually ends up in a hardware freeze. Plugging it back in goes to a normal boot, even though the HDD2's partition is no longer mounted to anything. I've tried to eliminate the BIOS as a source of the problem, have updated it to the latest version and ensured that the disk-to-be-removed is not seen in any BIOS configurations. I attach the one log file I am able to capture, since it freezes before mounting /var. As best as I can tell the freeze happens during the point of the bootup where it's running fsck on the drives. It may be looking for the removed HDD2 but I don't know where it's remembering to look for it. HDD2 is no longer in /etc/fstab and I searched in vain for any instance of the UUID of HDD2 in either /boot or /etc. Any suggestions? -- Evan Leibovitch, Toronto Canada @evanleibovitch or @el56

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Open CAPI Standard
by Nicholas Krause 03 Jan '20

03 Jan '20

Greetings, I mentioned this to some of you at the meeting in December but IBM and others are working on creating a new standard to replace PCI express and some of its limitations called Open CAPI. The current versions is as fast as NVLink at 50GBs in a x16 lane from memory which future versions being able to hit over 100GBs in the same lane speed and 250ms latency guaranteed as compared to the 500ms to 750ms in PCI express. This is a link:https://opencapi.org/ to anyone who wants to read the spec, through you will have to give them a email and I believe where you work. Currently POWER is the only real architecture supporting it through or NVlink for that matter. Nick

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The Computer Chronicles - UNIX (1985) - YouTube
by James Knott 03 Jan '20

03 Jan '20

I used to watch this series when it was on Ch 23, Buffalo, then the 2nd PBS station. Since it wasn't carried on Rogers, I had a small set top UHF antenna, which worked very well sitting in the window of my 14th floor apartment, facing south from the Port Credit area of Mississauga. https://www.youtube.com/watch?v=0DdoGPav3fc

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Rust intro tonight (free)
by D. Hugh Redelmeier 02 Jan '20

02 Jan '20

I don't know anything about General Assembly but they are hosting a "Practical Introduction to Rust" at 18:30 Thursday (today). You need to register. <https://generalassemb.ly/education/practical-introduction-to-rust/toronto/9…> It is given by a Blad Filippov of Mozilla Preparation: "Bring a laptop with a code editor installed. Bonus points for installing the Rust toolchain: https://rustup.rs/" I'm going to go. I assume that the text editor I use qualifies as a code editor.

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10TB drive seen as a 2TB drive (twice?)
by Evan Leibovitch 30 Dec '19

30 Dec '19

It's not an Xmas present as it was bought a few weeks ago, but I'm trying to install a 10TB WD (Red Pro) disk and it's not exactly going to plan. My original plan was to put the disk into an external case, plug it in to format and copy over files, then install it in the case. The system already has an SSD as /dec/sda, and two disks one of 3TB and the other of 4TB, all working fine. When I attach the external drive, lsblock and fdisk -l both report TWO new drives, /dev/sdd and /dev/sde, both of 2TB size. I went into set the disk from DOS to GPT but the size didn't change; Now fdisk -l reports: Disk /dev/sdd: 2 TiB, 2199023255040 bytes, 4294967295 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 49FDD63D-6C95-46F0-B7B1-650038D8FB9B Disk /dev/sde: 2 TiB, 2199023255040 bytes, 4294967295 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes And cat /proc/scsi/scsi reports: Host: scsi10 Channel: 00 Id: 00 Lun: 00 Vendor: WDC WD10 Model: 1KFBX-68R56N0 Rev: 0200 Type: Direct-Access ANSI SCSI revision: 04 Host: scsi10 Channel: 00 Id: 00 Lun: 01 Vendor: WDC WD10 Model: 1KFBX-68R56NLUN1 Rev: 0200 Type: Direct-Access ANSI SCSI revision: 04 The disk model is WD101KFBX and its specs can be found here. <https://documents.westerndigital.com/content/dam/doc-library/en_us/assets/p…> All of the online guides I've consulted say that the full capacity of the drive should be visible once I switch it to GPT mode. Is this a USB limitation? Or is there something else I need to change? I've attached the output of hwinfo if that's any help. Thanks for any suggestions! -- Evan Leibovitch, Toronto Canada @evanleibovitch or @el56

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Stream URL question
by Peter King 30 Dec '19

30 Dec '19

A few weeks ago, JazzFM changed ... something ... and I was no longer able to access the live stream at https://ice66.securenetsystems.net/CJRT. Now I get an "error -34 [HTTP:401 Unauthorized]" message. But if I navigate to that webpage, I get a player that I can click on without any credentials, and it plays just find. Since I use Streamripper 1.64.6 under Arch Linux for time-shifting some of their programming, this is not a workable solution. Anyone know the address of the live stream I can use now? Google hasn't been any help. Thanks. -- Peter King peter.king(a)utoronto.ca Department of Philosophy 170 St. George Street #521 The University of Toronto (416)-946-3170 ofc Toronto, ON M5R 2M8 CANADA http://individual.utoronto.ca/pking/ ========================================================================= GPG keyID 0x7587EC42 (2B14 A355 46BC 2A16 D0BC 36F5 1FE6 D32A 7587 EC42) gpg --keyserver pgp.mit.edu --recv-keys 7587EC42

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DNS-over-HTTPS - what's the use?
by Giles Orr 24 Dec '19

24 Dec '19

Firefox now makes available DNS-over-HTTPS. I'm a big fan of security and privacy, but I'm struggling to see the gains here: we stop some hypothetical observer from finding out what domain name we're querying ... and then immediately turn around and ask that domain for a web page. You hid the destination in your first query ... only to immediately expose it with your next query. I admit I'm thinking of our hypothetical advisor being at the ISP: they'll see both types of queries anyway. I suppose the argument can be made that an observer on the path to the DNS but not at the ISP has been stymied, but this seems ... lower value. Still, is that primarily what this will stop? -- Giles https://www.gilesorr.com/ gilesorr(a)gmail.com

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LLVM talk slides
by Christopher Browne 22 Dec '19

22 Dec '19

I have put the slides that we weren't able to see at the December meeting up on GitLab at the following link... https://gitlab.com/gtalug/board-meetings/blob/master/uploads/Introduction%2… It's possible Alex may shift that to a better place, but that should at least make them accessible. -- When confronted by a difficult problem, solve it by reducing it to the question, "How would the Lone Ranger handle this?"

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Phishing is no mirage...
by Christopher Browne 19 Dec '19

19 Dec '19

This morning, I received a realistic looking message appearing to be from our hosting provider (linode) which was trying to convince me to send out my credit card information. Titled... "Linode Support Ticket 13142320 - Other - Account Limit reached. Please open a support ticket." This may even be more of a "spear phishing" thing as it it was broadly personalized to me, as I help manage the GTALUG account at linode. Something was looking suspicious about the URL... http://login.linode.com.login.return.to.https.21354545.paulinasfriends.com -- When confronted by a difficult problem, solve it by reducing it to the question, "How would the Lone Ranger handle this?"

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