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Mar
25
comment How do I tell if my Memory is ECC or Non-ECC?
Years ago, Logic Parity (or "Fake Parity") RAM was available that allowed the use of non-parity RAM in a motherboard that requires ECC. I don't think fake partiy is common now in legitimate RAM, but off-brand or counterfeit RAM may still use fake parity to cut costs. If your ram did have this fake-parity, your operating system wouldn't know, it would think it's real parity.
Mar
13
comment Do rackmount servers need to be in a rack?
Agreed on the dust problem, those small (but loud) fans quickly clog up with dust (moreso than the larger fans typically found in desktops). We had a test cluster on a carpeted floor and over months the fans because louder and louder until finally we opened the servers up and found the fans half clogged with dust, as well as the CPU heatsinks.
Feb
24
comment Do we really need to check the integrity of downloaded files?
A file checksum is not a security check since an attacker that can modify the file could likely also modify the checksum.
Feb
24
comment Do we really need to check the integrity of downloaded files?
To add to @kapep's comment, it's even better to validate using cryptographical signatures (using keys distributed through a secure channel). That way an attacker would have to compromise both the keystore and the repository in order to alter the binary.
Feb
4
comment How many times can I format a hard disk?
Are manufacturing tolerances such that SSD cell cycle lifetime is a precise number? I always thought it was a conservative number and your device could vary significantly from that number.
Jan
13
awarded  Enlightened
Jan
13
awarded  Nice Answer
Jan
5
comment Can you reuse a SSD after applying a Zero-Fill software?
When you re-install your operating system, use full-disk encryption and you won't need to worry about this again.
Dec
23
comment Recover Data from Card that cannnot be read
@Robin - he ought to buy two new SD cards to replace the bad one so he can keep a backup copy of the data.
Dec
18
comment Change MAC address of a wireless network adapter
@Flasimbufasa - did it work? Were you able to get on the network using the new MAC address?
Dec
17
awarded  Editor
Dec
17
revised Quick Way To 'Hide' or Encrypt Several Terabytes Of Data?
deleted 38 characters in body
Dec
17
comment Can the drives in a RAID 1 array be rotated?
@rex - RAID is not a backup solution, but it can be part of an implementation - years ago I used triple RAID-1 mirrors as part of a backup solution -- quiesce the database, break off one of the mirrors, then I could let the database continue to run while I did my 18 hour tape backup. I could have just as easily taken out the drives for that mirror and put them in a cabinet as a valid backup, putting in a new set of drives for the next backup.
Dec
17
answered Quick Way To 'Hide' or Encrypt Several Terabytes Of Data?
Oct
20
comment What is swap partition
@K7AAY - Back before RAM was so plentiful, the 2X RAM guideline applied even to unix (and unix-like) operating systemsbbb. I remember that being a guideline back when I was provisioning SunOS machines. I tried to find a reference, but the guideline is so prolific that I can't find anything that predates Linux. Nowdays on many VM's I don't provision swap at all since I don't want swapping to the already busy SAN. I'd rather that the application fail due to OOM than to have swapping.
Apr
22
awarded  Caucus
Feb
3
awarded  Good Answer
Feb
2
awarded  Yearling
Jan
7
comment FreeNas ZFS Non-Striped Configuration To Maximize Available Space?
Since Zfs doesn't support simple concatenated volumes, I can't point you to any zfs docs that describe it. Check your zpool man page for supported RAID levels (mirror, raidz, raid1 (same as raidz), raid2, raid3). Likewise, I don't have any docs that support zfs filesystem recovery for a failure mode of a raid type it doesn't support.
Jan
7
awarded  Commentator