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Contact: tech-kern Mentors: Christos Zoulas Duration estimate: 175h Test and debug the RAID 6 implementation in RAIDframe. NetBSD uses RAIDframe (raid(4)) and stub code exists for RAID6 but is not very documented or well tested. Obviously, this code needs to be researched and vetted by an interested party. Other BSD projects should be consulted freely. Milestones: * setup a working RAID 6 using RAIDFrame * document RAID6 in raid(4) manual page * port/develop a set of reliability and performance...
100% relevant, matching: raid


Size: 6.0K
UEFI-Boot, GPT and raidframe I have a new machine that wants to boot UEFI, and it has two disks that I want to mirror. I have booted NetBSD-8.0_BETA-amd64-uefi-install.img off a USB stick, and went from sysinst to shell. This implies I have tools and sets (in /amd64/binary/sets) locally, and a /targetroot directory. Several config files need to be created; I show them as "cat > file" because that shows what goes in there but by all means use a proper editor if you can't use cut+paste. UEFI does not use...
99% relevant, matching: raid


Size: 6.6K
tutorials/how to enlarge raidframe
How to enlarge RAIDframe Sometime one has to resize a filesystem. For FFS, we have resize_fss(8), but things are more complicated if the FFS filesystem is inside a RAIDframe set. This documents show how to fo deal with such a setup. The use case is a RAID-1 RAIDframe set of two 6 TB hard disks that were formatted the old way, using MBR and disklabel. This only enables using the first 2 TB of the disks, and migrating to GPT is required to use the full 6 TB. We will also need to enlarge the RAID, a tricky operation...
98% relevant, matching: raid


Size: 8.7K
set-up raidframe
THIS PAGE NEEDS AN UPDATE BECAUSE netbsd-10 has new raidctl create operation to make this easier After posting lots of questions, and getting lots of expert help, I finally got my new server up and running with raid! Since I asked so many questions, it was suggested that I recap the process so that someone else might be able to make it work without having to ask! So ... Here's what I did recently to get raid(4) up and running on my new server. This is really important! Read the man page for raidctl(8)....
94% relevant, matching: raid


Size: 1.9K
Behold! For now I have a wiki page! Blame for: raid(4) parity maps. The Xen block device backend in all its trampolined glory. Also, the Xen clock. The sparse kernel core dumps on i386. Assorted minor fixes. Probably stuff I'm forgetting. TODO: Fix raidctl(8) -m output for RAID-0 sets. Re-re-re-re-dust-off the raid(4) raid nested-autoconfigure thing and likewise. Trying to defer RAID sets until all the components show up is actually a bad idea. There's an order-of-configure field that could be automagically...
93% relevant, matching: raid


Size: 1010 bytes
Contact: tech-kern Mentors: Greg Oster Duration estimate: 175h Implement component 'scrubbing' in RAIDframe. RAIDframe (raid(4)) provides various RAID levels to NetBSD, but currently has no facilities for 'scrubbing' (checking) the components for read errors. Milestones: implement a generic scrubbing routine that can be used by all RAID types implement RAID-level-specific code for component scrubbing add an option to raidctl (raidctl(8)) to allow the system to run the scrubbing as required update...
91% relevant, matching: raid


Size: 5.9K
tutorials/how to install netbsd on raid1 using raidframe
In this article I will explain, step by step, how to install NetBSD on a RAID-1 root disk. Contents Foreword So, you just got yourself a pair of shiny new SCSI or SATA disks? You care about your data and you think backup is as important as having redundant data? You are disappointed because the netbsd raid1-root guide at 1 looks rather complicated? You want to setup a raid1 mirror during installation? This guide is losely based on the guide above, so check that out as well to get a better understanding...
74% relevant, matching: raid


Size: 1.8K
recentchanges/change 7038
Changed pages: set-up raidframe Changed by: riastradh Commit type: cvs Date: Saturday evening 03/23/24 set-up_raidframe.mdwn: should use raidctl create now Index: wikisrc/set-up_raidframe.mdwn =================================================================== RCS file: /cvsroot/wikisrc/set-up_raidframe.mdwn,v retrieving revision 1.9 retrieving revision 1.10 diff -u -r1.9 -r1.10 --- wikisrc/set-up_raidframe.mdwn 30 Nov 2013 16:36:58 -0000 1.9 +++ wikisrc/set-up_raidframe.mdwn...
61% relevant, matching: raid


Size: 23.9K
Contents What do you do to use a large disk with NetBSD? Here are two: wd1 at atabus3 drive 0 wd1: wd1: drive supports 16-sector PIO transfers, LBA48 addressing wd1: 5589 GB, 11628021 cyl, 16 head, 63 sec, 512 bytes/sect x 11721045168 sectors wd1: GPT GUID: 8ee69292-5099-11e4-833b-001cc4d779ed wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133) wd1(ahcisata0:1:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133) (using DMA) wd2 at atabus4...
61% relevant, matching: raid


Size: 1.3K
Contact: tech-kern Duration estimate: 1-2 months NetBSD has a fixed, kernel-wide upper limit on transfer size, called MAXPHYS, which is currently set to 64k on most ports. This is too small to perform well on modern IDE and SCSI hardware; on the other hand some devices can't do more than 64k, and in some cases are even limited to less (the Xen virtual block device for example). Software RAID will also cause requests to be split in multiple smaller requests. This limit should be per-IO-path rather than...
60% relevant, matching: raid

xapian-omega 1.4.25