Search found 227 matches

by gene0915
Fri Dec 20, 2019 12:25 am
Forum: Newbie Questions
Topic: How to use DD to test read/write performance of mdadm array?
Replies: 11
Views: 249

Re: How to use DD to test read/write performance of mdadm array?

You may want to check the s.m.a.r.t. status on all of your drives associated with the md0 array. It is possible you have one or more drives in a marginal state. Check the s.m.a.r.t. status as well as keep a record of the bad block remap count. If the bad block remap count continues growing, the dri...
by gene0915
Thu Dec 19, 2019 8:30 pm
Forum: Newbie Questions
Topic: How to use DD to test read/write performance of mdadm array?
Replies: 11
Views: 249

Re: How to use DD to test read/write performance of mdadm array?

Depending on the stripe size you might get better throughput with a larger blocking factor. Try changing the bs=1M count=1024 options and test it again. No idea why dd keeps giving such low numbers. I can copy a 20 gig to/from the array and get speeds of 400MB/s (reading from) and 500MB/s (writing ...
by gene0915
Thu Dec 19, 2019 4:25 pm
Forum: Newbie Questions
Topic: How to use DD to test read/write performance of mdadm array?
Replies: 11
Views: 249

Re: How to use DD to test read/write performance of mdadm array?

:?: Did you have any other programs reading or writing to the /mnt/md0 file system? Try changing the bs=32768 option and test it again. Please supply the output of the write and read test. I am curious did you create the RAIDs, or did you inherit the computer with them already setup? It is highly u...
by gene0915
Thu Dec 19, 2019 9:06 am
Forum: Newbie Questions
Topic: How to use DD to test read/write performance of mdadm array?
Replies: 11
Views: 249

Re: How to use DD to test read/write performance of mdadm array?

It would appear you have live data on the md0 array mounted on the /mnt/md0 mount point. You can perform a dd write test via the file system by using the following command: dd if=/dev/zero of=/mnt/md0/testfile bs=8192 count=102400 oflag=direct Using the file you just created with the write test, yo...
by gene0915
Wed Dec 18, 2019 8:42 pm
Forum: Newbie Questions
Topic: How to use DD to test read/write performance of mdadm array?
Replies: 11
Views: 249

Re: How to use DD to test read/write performance of mdadm array?

dd if=/dev/zero of=/tmp/test.bin options stuff and things here .... confuses me because I don't see anything in that command that tells dd which drive to use!? In our example the " of =/tmp/test.bin" instructs the dd utility to write to the output file /tmp/test.bin. You are correct if you use the ...
by gene0915
Wed Dec 18, 2019 6:08 pm
Forum: Chat about Linux Mint
Topic: Controversy surrounding Mint sponsor, Private Internet Access
Replies: 39
Views: 1103

Re: Controversy surrounding Mint sponsor, Private Internet Access

Thank you for bringing this up gene0915. And thank you jameskga for your thoughts. They are very well put. While I fully understand the need for sponsors, things are getting complicated when it comes to trust and privacy. I somewhat feel reminded to what's going on with startpage.com. This is right...
by gene0915
Tue Dec 17, 2019 11:07 pm
Forum: Newbie Questions
Topic: How to use DD to test read/write performance of mdadm array?
Replies: 11
Views: 249

How to use DD to test read/write performance of mdadm array?

I know that dd has the potential of wrecking your drive sooooooooo.... what is the correct syntax to test read and write performance of an mdadm array? (/dev/md0/) In the samples I've seen......stuff like: dd if=/dev/zero of=/tmp/test.bin options stuff and things here .... confuses me because I don'...
by gene0915
Tue Dec 17, 2019 12:48 pm
Forum: Chat about Linux Mint
Topic: Controversy surrounding Mint sponsor, Private Internet Access
Replies: 39
Views: 1103

Re: Controversy surrounding Mint sponsor, Private Internet Access

I have been interested in this subject since I first discovered PIA is a leading donator to the Miint project, and is also featured in the Software Manager. I've been aware since 18.x of PIA donating money to the project. I am aware Clem says donations do not steer decisions to include features. He...
by gene0915
Mon Dec 16, 2019 3:20 pm
Forum: Chat about Linux Mint
Topic: Controversy surrounding Mint sponsor, Private Internet Access
Replies: 39
Views: 1103

Controversy surrounding Mint sponsor, Private Internet Access

I saw PIA as a sponsor of Mint and thought I'd bring this up for awareness: https://www.hackread.com/private-internet-access-pia-vpn-sold-israel-privacy-concerns/ Personally, I cancelled my PIA account after reading about all this. Not sure I could ever trust a company who has been known to spew gar...
by gene0915
Thu Dec 12, 2019 9:27 pm
Forum: Newbie Questions
Topic: When adding new drives to an existing MDADM array, do I count the spare?
Replies: 1
Views: 71

Re: When adding new drives to an existing MDADM array, do I count the spare?

Figured it out. For future travellers, when you add drives to an existing array, they will simply sit there as hot spares. When you grow the array, you tell MDADM how many drives the new array should be and it will pull in as many hot spares as you tell it to with the --raid-devices= parameter. In m...
by gene0915
Thu Dec 12, 2019 4:38 pm
Forum: Newbie Questions
Topic: When adding new drives to an existing MDADM array, do I count the spare?
Replies: 1
Views: 71

When adding new drives to an existing MDADM array, do I count the spare?

So here's md0: /dev/md0: Version : 1.2 Creation Time : Sat Dec 2 21:22:25 2017 Raid Level : raid6 Array Size : 39068871680 (37258.98 GiB 40006.52 GB) Used Dev Size : 3906887168 (3725.90 GiB 4000.65 GB) Raid Devices : 12 Total Devices : 13 Persistence : Superblock is persistent Intent Bitmap : Intern...
by gene0915
Mon Dec 09, 2019 3:42 pm
Forum: Ethernet
Topic: Any performance tips for 10Gbps networking?
Replies: 1
Views: 186

Re: Any performance tips for 10Gbps networking?

As I work on resolving my problem, I did some experimenting, I setup the 10Gbps gear on a couple of Windows 10 boxes and was able to max out my SSD's going both ways (500MB/s). So I know the gear is fine. On my Mint 19.2 boxes, I was getting 2-3Gbps on file transfers. On one of the boxes, I trashed ...
by gene0915
Sun Dec 08, 2019 3:57 pm
Forum: Ethernet
Topic: Any performance tips for 10Gbps networking?
Replies: 1
Views: 186

Any performance tips for 10Gbps networking?

I have two Mint 19.2 boxes hooked together with a Mellanox DAC cable and Mellanox X3 cards. Cards are on the latest firmware and driver and plugged into PCI x16 slots in both systems. Both servers have a fast boot SSD and mdadm arrays. Doing testing with bonnie++, DD..... and everything else you can...
by gene0915
Sun Dec 08, 2019 2:20 pm
Forum: Hardware Support
Topic: mellanox driver install fails
Replies: 9
Views: 418

Re: mellanox driver install fails

MrEen wrote:
Sun Dec 08, 2019 2:16 pm
Great work, gene0915! I'm sure this will help others with the same issue.
I've gotten a lot of help from the folks on here over the years..... feels good to finally be able to give something back. :)
by gene0915
Sun Dec 08, 2019 2:10 pm
Forum: Hardware Support
Topic: mellanox driver install fails
Replies: 9
Views: 418

Re: mellanox driver install fails

Hi gene0915. Nice work figuring out a solution! Be aware that the change you made might produce trouble with other installations. I'd suggest to test if changing /etc/lsb-release back to what it was allows proper use of everything now that the driver is installed. I have no idea if the change will ...
by gene0915
Sun Dec 08, 2019 1:46 pm
Forum: Hardware Support
Topic: mellanox driver install fails
Replies: 9
Views: 418

Re: mellanox driver install fails

I figured it out! Log in as root and edit the lsb-release file: nano /etc/lsb-release: DISTRIB_ID=Ubuntu DISTRIB_RELEASE=18.04 Make those two changes. Then, the installer needs these packages so install them first: apt install debhelper swig libltdl-dev graphviz autoconf dpatch autotools-dev automak...
by gene0915
Sun Dec 08, 2019 12:46 pm
Forum: Hardware Support
Topic: mellanox driver install fails
Replies: 9
Views: 418

Re: mellanox driver install fails

In looking at the Perl code that produced the error, it simply is checking distro name, and not the version or release level. I believe the distro name for Mint is linuxmint. There is a section of code in the file I linked that checks for distro. It appears to use the lsb-release file. If you run t...
by gene0915
Wed Oct 02, 2019 7:54 am
Forum: Chat about Linux Mint
Topic: Advantage of Ubuntu over Debian as a package base for Mint?
Replies: 11
Views: 1130

Advantage of Ubuntu over Debian as a package base for Mint?

[ split from Re: LMDE 4 and moved here ] I wish that LMDE would be the primary focus but apparently the Ubuntu-based version has more fans. The reason it doesn't get as much attention is because LMDE is a fallback in case Canonical goes toes up and takes Ubuntu with it. But any idea why the Mint dev...
by gene0915
Fri Sep 13, 2019 7:25 pm
Forum: Other Topics & Open Discussion
Topic: LMDE 4
Replies: 86
Views: 18736

Re: LMDE 4

I have been bitten a couple of times with Ubuntu's delta over Debian, which is why I like LMDE, it is, especially with 3, a lot of Debian with just the right amount of sugar on top. ...snip... But this is YMMV territory, so I would not want to suggest it will work for you, all I can do is note it h...
by gene0915
Fri Sep 13, 2019 7:20 pm
Forum: Other Topics & Open Discussion
Topic: LMDE 4
Replies: 86
Views: 18736

Re: LMDE 4

I use MX Linux as my Plex server. It is included in MX package manager. I had to boot into the systemd kernel instead of the sysVinit kernel to keep it working correctly. I would just use Windows or Main Mint for Plex at this point though. Debian is a PITA on occasion with Plex and not worth the ag...

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