Thanks, I managed to get in, in the end!
Quick onboard RAID question.
I have 4 x 2TB drives. I would like to make one big RAID 1 group.
Will it allow me to make a single 4TB LUN or would I need to make 2 x 2TB LUNs? I try to assign all four drives to a RAID 1 group but it says max 2...
Ahhh perfect timing on the 64bit software, however how about that hardware to take advantage of the 64bit OS and more memory?
I hear later this year :)
I'm biased (EMC'er) but my big bug bear with Compellent is the fact that it is still 32bit.
Why does this matter? 4GB array cache. The end. No more.
The VNX natively goes up to 12GB per SP (I think) and on top of that you can add SSD drives as an extension of cache - this is an amazing...
Hi,
Probably poorly explained.
From what I remember the rotational latency is a fixed number. Average rotational latency is about half of the worst case latency. For 5400 rpm drives it's about 5.5, for 15k drives it is 2.
I can't work out how 0.5 becomes 2 either if it helps. I'll have a think.
I don;t, Let me explain. When I first build the server I left it on 'allow automatic updates'. Now before I went to bed one night I connected the LAN cable so I could remote into the array to see how it was going.
Come 3am it found it had internet, found some updates and rebooted iteself...
I'm stressing. 36 hours into my initial RAID 5 resych and with about 5 hours to go and my PC reboots.
I forgot automatic updates were on and the N36L set to apply them at 3am :/
Such a waste of time! Have to wait another 36 hours now.
So after a lot of work and a number of visits to my local PC part shop my N36L is finally up and running.
I have
Data: 6 x 2TB SATA
OS: 1 x Seagate 2.5" 320GB drive (small so I can hide it in the case)
ATI 5450
A dual port SATA hub to give me a few extra ports.
4GB Ram
Some questions...
So this is a massive thread and i've read through some of it to try and answer my questions but I think I may have to admit defeat and just ask.
I'm thinking about a NAS box - maybe the QNAP, Synology or the HP Proliant.
Do I need a RAID card if I put 6 drives in?
What is the process around...
So storage tiering and PAM/FAST Cache are two similar principles but ultimately different things.
Firstly PAM cards and EMC Fast Cache are all about one thing - increasing the array cache. Data that is most frequently accessed is brought up to the PAM / Fast Cache tier so I/O is serviced...
I've always been fond of Seagate. Back in the day when everyone was offering 3 years max warranty Seagate stepped up and offered 5 years. That's putting your money where your mouth is.
Drives have come a long way. 1998-2004 I used to lose drives all the time. Yet the last 5 years i've not lost...
Think of a backup as a point in time copy of data that you keep separate from the main data and may keep for a long period of time.
Companies take their backups from (typically) 7pm onwards. If they have a problem during the next day they can use the backup. If they need a file from 18 months...
So a backup is a copy of your data which you can use for recovery in a number of different scenarios.
Technically RAID is a copy of your data but it doesn't meet all the criteria of a backup - it's an up to date copy rather than a backup. It doesn't help you if you delete some files you...