233 reputation
314
bio website versulo.com
location Romania
age 21
visits member for 4 years, 10 months
seen Dec 18 at 15:21

Feb
17
comment Is it safe to use consumer MLC SSDs in a server?
@peterchen, you can use either a couple of SSDs or fifty 15K spindles.
Feb
10
awarded  Citizen Patrol
Feb
10
awarded  Yearling
Jan
20
comment Economical way to get many harddrives into rack mount?
@Hubert, no you can't with that design, because you need to remove the PSU casing from the chassis to remove the PSUs. Backblaze pod is just a horrible design when the data has any value. In their case, the data is not valuable, but storage is king.
Jan
13
comment How to stop Apache from crashing my entire server?
@CyberShadow, you could use MPM Apache and mod_fcgid + suPHP.
Jan
13
comment RAID 10, how layout works?
@micmcg, RAID10 is a nested RAID level. @Bastien974, in RAID10 you first mirror disks (RAID 1), then stripe them (RAID 0).
Jan
9
comment Economical way to get many harddrives into rack mount?
@Hubert, you can't stick redundant PSUs in the Backblaze pod really. Besides, the BB pod has three RAID 5 arrays (RAID 50), each with a LOT of disks. It's just a horrible design for anything that needs any sort of reliability. And yes, a month is a pretty good guess; they're big arrays with 1.5TB drives; an unrecoverable read error is almost a given during rebuild.
Jan
9
comment Economical way to get many harddrives into rack mount?
@Hubert, SATA II doesn't add expanders, it adds port multipliers, which are horrible. SAS expanders are far better.
Jan
9
comment Economical way to get many harddrives into rack mount?
Backblade pods ARE HORRIBLE. They are painfully slow, rebuilding the arrays will take A WHOLE MONTH, losing ONE SINGLE PSU will result in the loss of ALL THE DATA STORED ON IT. That's... not that great; they're all "home user" parts, not designed to run 24/7.
Dec
23
comment What causes hard disk failures?
The heads will instantly jump to the parked state on any modern hard-drive; the HDD has really strong magnets pulling the heads towards their parking spot, so if power is lost the electromagnet in the heads cuts off and they will jump to their "bed".
Dec
14
comment Dell PERC H700 - 3x RAID 1?
if you could flash the LSI firmware that would be great; coupled with expanders, it can RAID 240 drives.
Dec
13
comment Dell PERC H700 - 3x RAID 1?
I think the modular can also do 50 and 60, but it's limited to 4 drives (probably in the firmware). AFAIK it's LSI 2108 controller.
Nov
23
comment RAID 6 vs RAID 10? Which would you choose
@Insanity, you don't lose the RAID 10 array if you lose the wrong two drives, you lose if it the "wrong" second drive fails; the first failed drive can be any.
Nov
11
comment Power and Cooling Cost compared with Server/Hardware Cost
You need 2.6 times the power used to cool a server? Man, your servers are either Prescott-based or have poor airflow, or your cooling system is horribly inefficient; or all three.
Oct
26
comment Will disabling hyperthreading improve performance on our SQL Server install
Why would you upgrade to a X5500 series Xeon when a X5600 series costs the same and has two more cores and 4 more MB of L3 cache? That seems weird.
Oct
26
comment Will disabling hyperthreading improve performance on our SQL Server install
@Jess, @Ronald, and Nehalem has little L2 cache. The bulk is L3 which is shared across cores.
Oct
26
comment Will disabling hyperthreading improve performance on our SQL Server install
Nehalem-based CPUs have VERY, VERY LITTLE L2 cache, most of it L3 shared.
Oct
26
comment Will disabling hyperthreading improve performance on our SQL Server install
@Farseeker that only happens if you don't have a HyperThreading-aware operating system. Windows newer than 2000 is aware of it.
Oct
18
comment What are the major issues that affect the selection of a hosting provider country?
So how does this answer the question?
Oct
12
comment Virtualization for Linux (VMware vs VirtualBox vs KVM vs …)?
@intgr, sure, and so does ESX, but it's just the kernel, not a complete operating system with lots of programs and possibly even GUI, it's a minimal OS focused on only running virtual machines.