The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘RAID’ Category

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How Discord Supercharges Network Disks for Extreme Low Latency

Posted by jpluimers on 2024/12/27

A while ago there was an interesting point of using tiered md to both obtain low read latency and write safety on the Google Cloud Platform in [Wayback/Archive] How Discord Supercharges Network Disks for Extreme Low Latency

It is an interesting approach to universally tune performance within the sketched boundaries, but raised some questions as their aim was improving ScyllaDB performance and Unix-like platforms on Google Cloud Platform can supports ZFS.

In this case Discord wanted to improve their ScyllaDB that was already read/written from GCP Persistent Storage and used tiered md to improve that.

Read the rest of this entry »

Posted in *nix, *nix-tools, Cloud, GCP Google Cloud Platform, Google, Hardware, Infrastructure, NVMe, Power User, RAID, SSD | Leave a Comment »

A twitter call to say nice things about technology sparked interesting threads

Posted by jpluimers on 2022/05/27

A while ago [Archive.is] Adam Jacob on Twitter: “Let’s say nice things about technology today. I’ll start. If it wasn’t for @lkanies and @puppetize, there is no way we would have been able to adapt as an industry to the rise of the cloud. Quote tweet me with your own.” sparked some interesting threads.

First posts are below; click on them to see the full threads.

Read the rest of this entry »

Posted in Chrome, Configuration Management, Development, DevOps, Firefox, History, IaC - Infrastructure as Code, Infocom and Z-machine, Infrastructure, KVM Kernel-based Virtual Machine, LSI/3ware, Open Source, PDP-11, Power User, PowerShell, Puppet, Python, Qemu, Rust, Safari, Scripting, Software Development, UCSD Pascal, Vagrant, Veewee, Virtualization, Web Browsers, Xen | Leave a Comment »

Would lvmraid have been improved over 2019? (back then: very single threaded, and does not leverage anything of the power of the actual device)

Posted by jpluimers on 2021/10/18

Reminder to self to check out if things have improved over time: [WayBack] Kristian Köhntopp on Twitter: “Trying my lvmraid kata from yesterday in real hardware was very frustrating. Everything is very single threaded, and does not leverage anything of the power of the actual device. … Basically, my linear-to-raid conversion idea died in the crib.” described to 2019 situation:

–jeroen

Posted in Hardware, Power User, RAID | Leave a Comment »

LSI 9260-8i: all disks are “Unconfigured bad”

Posted by jpluimers on 2019/04/29

This is the second time in about 6 years that somehow after an ESXi reboot all of the drives on an LSI 9260-8i controller got into the state “Unconfigured bad”.

The trick to solve this is to:

  1. go into the WebBIOS of the LSI card
  2. mark all drives as “Unconfigured good”
  3. rescan for devices
  4. import the existing configuration
  5. reboot

More in depth steps with images:

–jeroen

Posted in LSI/3ware, Power User, RAID | Leave a Comment »

Refurbish the battery on an HP P410 BBWC | Opensource Blog

Posted by jpluimers on 2018/11/19

TL;DR: BBWC are using NiMh batteries that you can replace with bigger ones.

Source: [WayBack] Refurbish the battery on an HP P410 BBWC | Opensource Blog

Via: [WayBack] Very useful hack if you are running old HP Xeon servers and want to use the original disk controllers and spinny rust. – Alan Cox – Google+

–jeroen

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Posted in Hardware, Power User, RAID | Leave a Comment »

LSI sense codes

Posted by jpluimers on 2016/04/29

A while ago, I had RAID arrays suddenly drop out with unexpected sense codes.

I had a hard time tracking down what was wrong (it ended up being a faulty LSI Multi-lane Internal SFF-8087  to SATA/SAS Cable).

This caused all sorts of unexpected failures, hard to track down to any specific sense code.

As drives are bound to fail, and finding sense codes is a bit difficult, here are a few links that might help if I ever run into trouble again:

Read the rest of this entry »

Posted in LSI/3ware, Power User, RAID, SAS/SATA, SFF-8087 | Leave a Comment »

MegaRAID “Mark Drive as Missing” and “Make Drive Offline” do not always work: your bay needs to be a hotplug one.

Posted by jpluimers on 2016/04/12

Had a hard time finding out what to do to remove a failing drive as the MegaRAID “Mark Drive as Missing” and “Make Drive Offline” didn’t give any results.

So I did as Kirus did: just pull out the from the RAID enclosure drive. Apparently the Sharkoon QuickPort Intern 3-bay isn’t a hotplug one.

–jeroen

Posted in Power User, RAID | Leave a Comment »

Some links on recovery of drives on LSI megaRAID controllers.

Posted by jpluimers on 2016/03/30

Some links on recovery of drives on LSI megaRAID controllers.

–jeroen

Posted in LSI/3ware, Power User, RAID | Leave a Comment »

Some links on SSD RAID

Posted by jpluimers on 2016/03/29

In the future, I need to add my own experience as well. For now some links:

–jeroen

Posted in Hardware, LSI/3ware, Power User, RAID, SSD | Leave a Comment »

LSI MegaRAID 9361-4i, 9361-8i or 9380-8e: cables and BBUs

Posted by jpluimers on 2016/01/25

A few links just in case you want to get a BBU or SFF cables with SAS or SATA connectors for your LSI MegaRAID adapters 9361-4i, 9361-8i, 9380-4i4e or 9380-8e.

If you do hardware RAID over software RAID, use a BBWC or better: FBWC.

  • RAID adapters (HBAs):
    • LSI00406 or LSI00419: LSI MegaRAID Entry 9341-4i (1 internal connector)
    • LSI00407 orLSI00408: LSI MegaRAID Entry 9341-8i (2 internal connectors)
    • LSI00414 or LSI00415: LSI MegaRAID SAS 9361-4i (1 internal connector)
    • LSI00416 or LSI00417: LSI MegaRAID SAS 9361-8i (2 internal connectors)
    • LSI00438: LSI MegaRAID SAS 9380-8e (2 external connectors)
    • LSI00438: LSI MegaRAID SAS 9380-4i4e (1 external, 1 internal connector)
  • BBU (which is actually a flash based CacheVault. So it’s FBWC, not just a BBWC):
    • LSI00418 (LSICVM02)
  • Internal cable: SFF-8643 Mini-SAS HD to …
    • LSI00400: 0.6m straight SFF-8643 to straight SFF-8087
    • LSI00401: 0.8m straight SFF-8643 to straight SFF-8087
    • LSI00402: 1.0m straight SFF-8643 to straight SFF-8087
    • LSI00403: 0.6m straight SFF-8643 to straight SFF-8643
    • LSI00404: 0.6m straight SFF-8643 to straight SFF-8643
    • LSI00405: 0.6m straight SFF-8643 to straight SFF-8643
    • LSI00409: 0.5m straight SFF-8643 to4x straight SA​TA-SB
    • LSI00410: 0.6m straight SFF-8643 to4x straight SA​TA-SB
    • LSI00411: 1.0m straight SFF-8643 to 4x straight SA​TA-SB
    • LSI00412: 0.6m straight SFF-8643 to 4x straight SATA/SAS-8482 with power
    • LSI00413: 0.4m right-angled SFF-8643 to straight SFF-8643
  • External cable: SFF-8644 Mini-SAS HD to …
    • LSI00336: 1.0m straight SFF-8644 to straight SFF-8088
    • LSI00337: 2.0m straight SFF-8644 to straight SFF-8088
    • LSI00338: 6.0m straight SFF-8644 to straight SFF-8088
    • LSI00339: 1.0m straight SFF-8644 to straight SFF-8644
    • LSI00340: 2.0m straight SFF-8644 to straight SFF-8644
    • LSI00341: 6.0m straight SFF-8644 to straight SFF-8644

–jeroen

via: Which BBU should I use with my LSI RAID controller or Supermicro RAID controller based on LSI technology?  What do I include if I need to RMA my LSI BBU?

Video on the LSI00417:

https://www.youtube.com/watch?v=u6oUNW_dgAs

Posted in LSI/3ware, Power User, RAID | Leave a Comment »

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