<div dir="ltr"><div>Hi Richard,</div><div><br></div><div>Definitely bring along the Teclasts so we can have a poke. I'll be demonstrating some easy wins (Acer, Lenovo etc.) then go through the problems that can happen with the not-so-easy wins (Broadcom driver, MacBook, soft WiFi switch stuck off etc.). At which time it would be a perfect opportunity to discuss your issues with the Teclasts, so that participants can have a taste of what is in store when they have a go.</div><div><br></div><div>Hope to see you there!</div><div><br></div><div>DD<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, 31 Mar 2023 at 12:01, <<a href="mailto:plug-request@plug.org.au">plug-request@plug.org.au</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Send plug mailing list submissions to<br>
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Today's Topics:<br>
<br>
1. Re: Tapes (Brad Campbell)<br>
2. Linux workshop for noobs (Didi Mudigdo)<br>
3. Re: Linux workshop for noobs (Richard Jones)<br>
<br>
<br>
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<br>
Message: 1<br>
Date: Thu, 30 Mar 2023 17:36:11 +0800<br>
From: Brad Campbell <<a href="mailto:brad@fnarfbargle.com" target="_blank">brad@fnarfbargle.com</a>><br>
To: <a href="mailto:plug@plug.org.au" target="_blank">plug@plug.org.au</a><br>
Subject: Re: [plug] Tapes<br>
Message-ID: <<a href="mailto:80f5d4da-ed51-dd7f-4424-6c365b231202@fnarfbargle.com" target="_blank">80f5d4da-ed51-dd7f-4424-6c365b231202@fnarfbargle.com</a>><br>
Content-Type: text/plain; charset=UTF-8; format=flowed<br>
<br>
On 15/3/23 13:01, Brad Campbell wrote:<br>
> I've started using a combination of tar and pbzip2 for archiving, but I'm going to have to put a cheap 2TB SSD into the box with the tape drive to stage to, as I can't feed it fast enough (seeing ~130MB/s write speeds).<br>
> As it's an internal drive, my biggest issue has been cooling. Lot of blocking case holes with gaffa tape and re-arranging fans to get the airflow required to keep it cool during a write.<br>
<br>
Having had a play for a week or so, I've found pigz -i compresses nearly as well as lbzip2 and 3 times faster. Admittedly the CPU is an old AMD FX-8350, so it's not exactly a screamer.<br>
I'm using a 996GB source directory of 28 rsync backups from various machines ranging from ~250M to ~590G. I tar and compress these to the staging drive before writing them to tape.<br>
<br>
tar through lbzip2 gets them down to 753G in 5 hours 23 minutes. That is limited by compression.<br>
tar through pigz -i gets them down to 763G in 1 hour 50 minutes. That's not limited by compression, rather tar reading the data from the "super cheap and nasty budget SSD" I chose to play with.<br>
I bought a Crucial MX500 for the staging/spool drive, and then I thought I'd try my luck with the cheapest 2TB SSD I could buy as a source. An SP Data A55, and it's pretty bad.<br>
<br>
I have also tested recovery of several archives by blowing holes in them, and the archives created with pigz -i recover as well as the various bzip2 incarnations.<br>
<br>
> While this is working adequately, I've ordered a proper external enclosure with the right cooling.<br>
<br>
I ordered an "untested" Dell external LTO-5 SAS drive on E-bay ($240 delivered) because that was about half the price of an empty enclosure. I figured the drive would be a bust but I'd get a good external SAS enclosure out of it.<br>
Turns out the "untested" drive has no issues, and has done less work than the internal HP I bought first. By the logs it looks like someone bought it to read LTO3 and LTO4 tapes and it's only done about 50 tape reads.<br>
<br>
About time I had a win.<br>
<br>
I have a nice little script that generates an index file from the staging directory, then sequentially writes each tarball to tape. Bulk restore just reads the whole tape, or for selective I dump the index, mt fsf to the one I want as listed in the index, and just restore from there.<br>
<br>
Drive encryption works well and easy to set up using stenc. No issues with read/write compatibility between either drive, so looks like I'm off to the races.<br>
<br>
Appreciate all the pointers.<br>
<br>
Regards,<br>
Brad<br>
<br>
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<br>
Message: 2<br>
Date: Thu, 30 Mar 2023 18:06:27 +0800<br>
From: Didi Mudigdo <<a href="mailto:didi@didi.com.au" target="_blank">didi@didi.com.au</a>><br>
To: <a href="mailto:plug@plug.org.au" target="_blank">plug@plug.org.au</a><br>
Subject: [plug] Linux workshop for noobs<br>
Message-ID:<br>
<<a href="mailto:CA%2BMbd-rbFPuNFMi8zBkdwh6cbeuo-f4hWvcSciPLjxbfRHiLiQ@mail.gmail.com" target="_blank">CA+Mbd-rbFPuNFMi8zBkdwh6cbeuo-f4hWvcSciPLjxbfRHiLiQ@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Hi there,<br>
<br>
I'll be running a 1-hour workshop 1 pm Wed 12th April @ South Perth<br>
Learning Centre on installing Linux on your old computer, please spread the<br>
word if you know some noobs who would be interested in this:<br>
<br>
"Don't throw out your old laptop just yet, most of the time you just need<br>
to give it an alternative operating system! Replace your Windows OS/Mac OS<br>
with Linux, a modern community-driven operating system that can run on very<br>
low hardware resources (e.g. a mere 1 GB RAM, with a 16 GB hard drive), and<br>
bring your old laptop back to life. Come to this 1-hour workshop to see<br>
Linux in action, rejuvenating computers up to 15 years old. If you bring<br>
your old laptop you can follow along as we also demonstrate step-by-step<br>
the process of installing Linux."<br>
<br>
Sign up:<br>
<a href="https://classmanager.com.au/cbin/admin.php?Action=courses&single_course_id=1927&organisation_name=splc&from=org_home" rel="noreferrer" target="_blank">https://classmanager.com.au/cbin/admin.php?Action=courses&single_course_id=1927&organisation_name=splc&from=org_home</a><br>
<br>
Thank you!<br>
<br>
Didi<br>
<br>
PS: I've installed various Linux distros on various computers since 2011,<br>
but this will be my first time running this workshop, so any tips/pointers<br>
from your experience on showing noobs how to install/use Linux will be most<br>
appreciated :)<br>
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Message: 3<br>
Date: Thu, 30 Mar 2023 18:13:27 +0800<br>
From: Richard Jones <<a href="mailto:bwl@vivaldi.net" target="_blank">bwl@vivaldi.net</a>><br>
To: <a href="mailto:plug@plug.org.au" target="_blank">plug@plug.org.au</a><br>
Subject: Re: [plug] Linux workshop for noobs<br>
Message-ID: <<a href="mailto:1e42eab9-731b-aa96-981d-a7ec41723e47@vivaldi.net" target="_blank">1e42eab9-731b-aa96-981d-a7ec41723e47@vivaldi.net</a>><br>
Content-Type: text/plain; charset=UTF-8; format=flowed<br>
<br>
I've been installing linux on my gear for >20 years but I have a couple <br>
of things where I'm stumped (Teclast laptop and tablet). Is this <br>
suitable to bring along as a challenge or would that undermine the exercise?<br>
<br>
Richard<br>
<br>
On 30/3/23 18:06, Didi Mudigdo wrote:<br>
> Hi there,<br>
> <br>
> I'll be running a 1-hour workshop 1 pm Wed 12th April @ South Perth <br>
> Learning Centre on installing Linux on your old computer, please spread <br>
> the word if you know some noobs who would be interested in this:<br>
> <br>
> "Don't throw out your old laptop just yet, most of the time you just <br>
> need to give it an alternative operating system! Replace your Windows <br>
> OS/Mac OS with Linux, a modern community-driven operating system that <br>
> can run on very low hardware resources (e.g. a mere 1 GB RAM, with a 16 <br>
> GB hard drive), and bring your old laptop back to life. Come to this <br>
> 1-hour workshop to see Linux in action, rejuvenating computers up to 15 <br>
> years old. If you bring your old laptop you can follow along as we also <br>
> demonstrate step-by-step the process of installing Linux."<br>
> <br>
> Sign up: <br>
> <a href="https://classmanager.com.au/cbin/admin.php?Action=courses&single_course_id=1927&organisation_name=splc&from=org_home" rel="noreferrer" target="_blank">https://classmanager.com.au/cbin/admin.php?Action=courses&single_course_id=1927&organisation_name=splc&from=org_home</a> <<a href="https://classmanager.com.au/cbin/admin.php?Action=courses&single_course_id=1927&organisation_name=splc&from=org_home" rel="noreferrer" target="_blank">https://classmanager.com.au/cbin/admin.php?Action=courses&single_course_id=1927&organisation_name=splc&from=org_home</a>><br>
> <br>
> Thank you!<br>
> <br>
> Didi<br>
> <br>
> PS: I've installed various Linux distros on various computers since <br>
> 2011, but this will be my first time running this workshop, so any <br>
> tips/pointers from your experience on showing noobs how to install/use <br>
> Linux will be most appreciated :)<br>
> <br>
> _______________________________________________<br>
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> Committee e-mail: <a href="mailto:committee@plug.org.au" target="_blank">committee@plug.org.au</a><br>
> PLUG Membership: <a href="http://www.plug.org.au/membership" rel="noreferrer" target="_blank">http://www.plug.org.au/membership</a><br>
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PLUG discussion list: <a href="mailto:plug@plug.org.au" target="_blank">plug@plug.org.au</a><br>
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End of plug Digest, Vol 225, Issue 5<br>
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</blockquote></div>