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bio website thepeoplescube.com
location US NortheEast
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visits member for 1 year, 2 months
seen Mar 11 at 13:41

Mar
11
comment How to block ALL communications with an IP-address using iptables?
Using iptables -I PREROUTING -s $IP -j DROP blocks the $IP from neither the router itself nor from LAN. Same when I use "raw" instead of "PREROUTING".
Mar
8
comment How to block ALL communications with an IP-address using iptables?
That is, what I'm doing right now -- so as to only ssh into the router once. But no, it does not count, in my opinion... And, ideally, I'd like a single rule -- not just a single command (that creates multiple rules) -- because I'm a little concerned for the router-memory. I don't want these rules to occupy all the RAM after a few weeks.
Mar
7
asked How to block ALL communications with an IP-address using iptables?
Aug
13
comment What is the Mean Time to Failure (MTTF) of a RAID5?
Mfinni, yes, there are corelated failures, but having a hot spare will not help you against those much either: you are likely to have not just two, but several (or even all) drives fail to the same environmental problem, that killed the first one...
Aug
13
awarded  Student
Aug
13
comment What is the Mean Time to Failure (MTTF) of a RAID5?
Thanks, David. Could you reword the answer to calculate the MTTF, though? And, preferably, use the variables (N, r, and T) so I can pick your answer...
Aug
13
comment What is the Mean Time to Failure (MTTF) of a RAID5?
David, I know very well about point 2 -- if you read my question carefully, a second drive failing during the recovery is how I define the death of the entire array. But I'm asking about a formula (or, at least, a number). If the rebuild component of the recovery time r is, indeed, as big as 30 hours, then using hot spares makes even less sense -- an operator can put in a cold spare in 4-6 hours tops (and usually much faster).
Aug
13
asked What is the Mean Time to Failure (MTTF) of a RAID5?