1,028 reputation
2921
bio website don.smugmug.com
location California
age 37
visits member for 4 years
seen Nov 19 at 21:40

Founder, CEO & Chief Geek at SmugMug. Leia, Logan & Audrey's Papa. Lover of Liz.


Jan
20
comment How can I successfully mount an 8-bit SCSI drive on a modern computer?
To keep everyone apprised, especially because it's trending on Hacker News, I have a SCSI card on order (who knew that Amazon Prime had so many older, even ISA!, cards available?) and should be able to tackle some of this next week. I'll certainly keep everyone posted. :)
Jan
17
comment How can I successfully mount an 8-bit SCSI drive on a modern computer?
I was planning on using dd to create an exact copy and figuring out the rest later. IIRC (its been awhile), NeXT used a UFS filesystem similar to other BSD variants. I suspect Linux can just mount it natively, like it can other UFS variants, so I'd then be able to (with John's permission) pass around the disk images and anyone could mount them on a Linux box.
Jan
17
comment How can I successfully mount an 8-bit SCSI drive on a modern computer?
I believe the slabs have internal SCSI-1, external SCSI-2. But it's been a long time since I drooled over those spec sheets (and the engineering samples at NeXT HQ!)
Jan
17
comment How can I successfully mount an 8-bit SCSI drive on a modern computer?
Any ideas on what I need to do as far as cabling, adapters, and/or termination are concerned? It's been a long time since I've dealt with old SCSI like this.
Mar
8
comment Why is this MySQL FULLTEXT query returning 0 rows when matching rows are present?
Or switch back to a pre-5.5 revision. :) Thanks!!
Mar
5
comment Why is this MySQL FULLTEXT query returning 0 rows when matching rows are present?
Sorry, should have put that in before. Edited, but it's 5.5.4. Haven't tried 5.5 GA yet, but didn't see anything in the notes that suggested it would make a difference.
Feb
1
comment Possible to get SSD TRIM (discard) working on ext4 + LVM + software RAID in Linux?
This sounds promising, but my understanding is that dmraid is primarily used for so-called 'fakeRAID' hardware RAID controllers. What I'm talking about is a more typical software-only mdadm RAID-1 (+0) array(s) with LVM on top. AFAIK, that setup doesn't benefit from dmraid's new-found ability to handle discards. Right?
Feb
1
comment SSD TRIM (discard) problems with ext4 on Crucial C300 SSDs with CentOS 5.5
Good question. Nope, directly attached to the bus.
Jan
30
comment Possible to get SSD TRIM (discard) working on ext4 + LVM + software RAID in Linux?
Saw that thread, and the related commits, but like I said in the question - does this mean it'll properly pass through not only LVM (Device Mapper) but also md (Software RAID)?
Dec
12
comment Datacenter with fast connectivity to AWS Virgina (S3 data exchange)
Gigabits per second, certainly. How many? We haven't exhaustively checked.
Dec
6
comment How can I deploy a scalable, reliable haproxy cluster on Amazon EC2?
Yeah, if an ELB spans multiple AZs and has some sort of failure where it cannot get to any of the backend nodes in an AZ (they're overloaded, down, returning 503s, whatever), end users see those errors - it doesn't re-route to the other AZ(s). I'm hoping that's planned, but it's bitten us once already.
Dec
5
comment How can I deploy a scalable, reliable haproxy cluster on Amazon EC2?
So I love approach #1, that's the direction I've been leaning, but there are still some interesting gotchas - not the least of which is that ELB doesn't handle an entire AZ failing very well (something we've had happen already). The easy, but yucky, 'solution' there is to have the haproxies behind ELB configured to cross AZs (maybe with a backup cluster in another AZ) so if at least one haproxy is up in each AZ, we should be fine. But that only mimimizes, not eliminates the problem. Any ideas around this problem?
Dec
4
comment EC2 instance backup
There are a lot of benefits to going with an EBS volume instead, such as faster boot times, but I can't tell you if it'll work for your use case or not. There is documentation out there on how to convert - but make sure you've backed up your ephemeral storage first or you may lose it if you don't make the transition right.
Dec
4
comment How can I deploy a scalable, reliable haproxy cluster on Amazon EC2?
We use puppet in our datacenters, but haven't tried on EC2 yet. Is puppet EC2-aware somehow, such that it can find nodes using ec2-describe-instances or something, and automagically configure / reconfigure based on that output? And how would you handle the puppetmaster going away suddenly?