990 reputation
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location Virginia
age 31
visits member for 5 years, 2 months
seen 2 days ago

Jun
21
awarded  Talkative
Jun
20
awarded  Popular Question
Jun
8
accepted Making SATA disk write cache safe
Apr
30
awarded  Yearling
Jan
30
comment Anybody tried to use graphic card as a precision clock on a Windows server?
I hope you mean NTP, not NNTP. Doing time sync over NNTP would be, I dare say, a sign of insanity.
Jan
10
comment Recover RAID 5 data after created new array instead of re-using
FYI: for a while, its been possible to have partitioned md arrays. Originally, they had their own mdp devices, but as of Linux 2.6.28, all md arrays are partitionable. The mdadm manpage has some details. So the OP may need to reconstruct a partition table as well...
Dec
26
comment How do I append a specific number of null bytes to a file?
Its much faster because it'll generate a sparse file, which is what you want most of the time—but if you don't want a sparse file, the dd approach will work.
Dec
19
comment RAID layout for terminal server usage - what are my options?
@Matthew: RAID-6 write performance doesn't have to be that bad. If you're writing large files (so you write the entire stripe at once), with a 14-disk RAID-6 you write 12 disks of data and 2 disks of parity. That's actually much better than RAID10, where you write 7 disks of data and 7 disks of mirror. The problem is when you're not writing the entire stripe, as you get the infamous read-write cycle (read 1 disk of data + 2 disks of parity [or all 12 data disks if you're verifying], write 1 disk of data + 2 disks of parity).
Dec
14
comment Kindly help me on how to handle the hacker
What are these URLs he's hitting? Don't need the domain, just the path (e.g., http:// www.domain.com/ path)
Dec
5
comment Server RAID died. How would you recover data from its drives?
Better yet after your dd, attempt recovery from the backup. That way, if it turns out your dd didn't work, you can do it again.
Nov
28
comment Do user permissions differ in case of different groups?
@Trott: Actually, it's probably a better match for Unix.SE. Or, if these are Ubuntu machines, AskUbuntu. I'm guessing StuckAgain is not a professional sysadmin, the main target audience for ServerFault.
Nov
18
comment bind9 upgrade on Linux lenny distribution
debian.org/releases may help some, as might debian.org/security So does the actual bind9 DSA at debian.org/security/2011/dsa-2347
Nov
18
comment bind9 upgrade on Linux lenny distribution
Well, the obvious answer is that the server is connected to a network, maybe even an internet, but not the Internet. (Having name resolution on your internal networks is quite useful, even on networks which aren't connected to the Internet for security or cost reasons)
Nov
18
comment bind9 upgrade on Linux lenny distribution
FYI, Lenny is currently oldstable and still has security support. Including the recent bind9 DSA.
Nov
18
comment bind9 upgrade on Linux lenny distribution
Please don't re-ask it, instead wait for the moderators to move it over for you. You can also flag your own question to ask for a move, I believe.
Nov
10
comment How much SWAP space on a high memory system?
@warren: OK, I'm running OpenJDK on 64-bit, with Xmx and Xms the same. But I'm not sure how java would force itself to swap, the only syscall close would be madvise, but that won't fail... that bug talks about running out of memory during garbage collection. Adding swap prevents that, of course, but so would adding RAM. Maybe its due to 32-bit with PAE?
Nov
10
comment How much SWAP space on a high memory system?
@warren: I have Tomcat instances, each in excess of 3GiB, yet using no swap (and one is using hugepages, and thus can't be swapped). Not sure what you're talking about.
Nov
7
comment Long Distance Networking Options
When running your PVC conduit, please remember to install extra pull strings.
Oct
28
comment How to monitor internet traffic on a Linksys E3000 router
There are third-party firmware images for your router which will give you that functionality (if it isn't already built in). I'm sure the folks on SuperUser will know more. You can "flag" your own question for migration if you'd like.
Oct
14
comment Cutting down network noise on an industrial control network
You don't even necessarily need routing if your control PC (operator interface) can do VLAN trunking to be on both VLANs. Or if the operator interface only needs to be on the control VLAN.