Archive for the ‘RAID’ Category
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 »
Posted by jpluimers on 2022/05/27
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 »
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:
go into the WebBIOS of the LSI card
mark all drives as “Unconfigured good”
rescan for devices
import the existing configuration
reboot
More in depth steps with images:
–jeroen
Posted in LSI/3ware , Power User , RAID | Leave a Comment »
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 »
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 »
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 »
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 »
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 (HBA s):
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 ):
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 SATA-SB
LSI00410: 0.6m straight SFF-8643 to4x straight SATA-SB
LSI00411: 1.0m straight SFF-8643 to 4x straight SATA-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:
VIDEO
Posted in LSI/3ware , Power User , RAID | Leave a Comment »
The Wiert Corner - irregular stream of stuff 