http://www.itbusinessedge.com/cm/community/kn?view=discussions Most recent forum messages en Sat, 23 May 2009 03:35:18 GMT Clearspace 2.5.5 (http://jivesoftware.com/products/clearspace/) 2009-05-23T03:35:18Z en http://www.itbusinessedge.com/cm/message/1405?tstart=0#1405 I hear you man. I would not go nuts on a DAS, However, occationally I am called to setup several RAID servers connected to a SAN Box for Video post production for studios. These systems copy Gigabytes of data in the blink of an eye. I honestly don't see Sat, 23 May 2009 03:35:18 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1405?tstart=0#1405 2009-05-23T03:35:18Z 6 months, 2 days ago http://www.itbusinessedge.com/cm/message/1396?tstart=0#1396 Okay, then what RAID do I use in the SAN? Even though technology has advanced as you say, we still can't get away from this problem. As I said earlier, we have to look at all factors when devcding on storage. In some situations, cost will be a factor. Fri, 22 May 2009 04:21:25 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1396?tstart=0#1396 2009-05-22T04:21:25Z 6 months, 3 days ago http://www.itbusinessedge.com/cm/message/1395?tstart=0#1395 This is actually an interesting thread considering we are covering an age old debate. I propose that we put some real thought into this question, it is too easy to simply repeat the age old answer that RAID 5 is better in every case.   In the name Fri, 22 May 2009 02:17:36 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1395?tstart=0#1395 2009-05-22T02:17:36Z 6 months, 3 days ago 2 http://www.itbusinessedge.com/cm/message/1394?tstart=0#1394 Warrick, I agree that both RAID 1 and RAID 5 provide the fault tolerance that most places will need I wouldn't just use RAID 1 because of disk cost savings.  RAID 5 can read the data quicker than RAID 1 can so that might be something to keep in mind if Fri, 22 May 2009 00:26:02 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1394?tstart=0#1394 2009-05-22T00:26:02Z 6 months, 3 days ago http://www.itbusinessedge.com/cm/message/1393?tstart=0#1393 I will choose RAID 5 over RAID 1. The reason is because RAID 5 has more benefits than RAID 1. The first thing to factor out of this discussion is about pricing. As we all know, not any amount of money can pay for data. When we are talking about Thu, 21 May 2009 04:58:46 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1393?tstart=0#1393 2009-05-21T04:58:46Z 6 months, 4 days ago http://www.itbusinessedge.com/cm/message/1392?tstart=0#1392 Given my limited knowledge on the many RAID levels out there. I think striplng is useless as it does not offer any kind of redundancy. My Choice would be a RAID 5+ 1 because of the level of protection and fault tolerance that it offers.  I Could  lose Thu, 21 May 2009 03:59:09 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1392?tstart=0#1392 2009-05-21T03:59:09Z 6 months, 4 days ago http://www.itbusinessedge.com/cm/message/1391?tstart=0#1391 I just read this article on zdnet and thought y'all might find it interesting. (It is relevant)   http://blogs.zdnet.com/storage/?p=162 Wed, 20 May 2009 16:41:58 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1391?tstart=0#1391 2009-05-20T16:41:58Z 6 months, 4 days ago http://www.itbusinessedge.com/cm/message/1384?tstart=0#1384 I would use RAID 5. It offers efficient storage, execellent security, and good performance. Plus, it is ideal for file and application servers. Two things that would be high on my 'concern' list. Mon, 18 May 2009 20:04:49 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1384?tstart=0#1384 2009-05-18T20:04:49Z 6 months, 6 days ago http://www.itbusinessedge.com/cm/message/1389?tstart=0#1389 I have to agree with Dave. This is an expensive way to allocate arrays, but it offers speed and high degree of redundancy.This method can be performed by creating separate array for log files and data. Since log files are mostly write to, isolating a Tue, 19 May 2009 03:13:13 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1389?tstart=0#1389 2009-05-19T03:13:13Z 6 months, 6 days ago http://www.itbusinessedge.com/cm/message/1388?tstart=0#1388 There is no clear cut answer between RAID1 and RAID5. It is really how the data is going to be used or accessed. RAID5, with more disks, would enhance the read performance. The RAID5 read performance increases as more disks are added to the array Tue, 19 May 2009 03:05:05 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1388?tstart=0#1388 2009-05-19T03:05:05Z 6 months, 6 days ago http://www.itbusinessedge.com/cm/message/1387?tstart=0#1387 Here is the flaw in that thinking...if you only used one disk (plus the mirror) that means that ALL reads and writes come from only one disk. You would have contention. You would need a minimum of two disk to spread the load just for performance. That Tue, 19 May 2009 01:50:12 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1387?tstart=0#1387 2009-05-19T01:50:12Z 6 months, 6 days ago http://www.itbusinessedge.com/cm/message/1386?tstart=0#1386 I'm going to go against the grain on this one, to make this thread "interesting", RAID stands for Redundant Array of Inexpensive Disks. IF I was restricted to just one option I would go with RAID 1! My logic here is that RAID 1 requires at least 2 Tue, 19 May 2009 01:01:06 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1386?tstart=0#1386 2009-05-19T01:01:06Z 6 months, 6 days ago 2 http://www.itbusinessedge.com/cm/message/1385?tstart=0#1385 Dave makes a great point for using RAID 5+1. Looking at the big picture it comes down to money. What is the cost-benefit ratio between using RAID 5 compared to RAID 5+1? It all depends on your company and what their needs are. Is speed more important Mon, 18 May 2009 20:10:56 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1385?tstart=0#1385 2009-05-18T20:10:56Z 6 months, 6 days ago http://www.itbusinessedge.com/cm/message/1382?tstart=0#1382 My strategic preference, assuming I had the budget, would be two Raid 5 machines configured as Active/Passive cluster - or Active/Active if the load was heavy.   I like Raid 5 because one can still recover the data (as long as only one drive Mon, 18 May 2009 16:52:36 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1382?tstart=0#1382 2009-05-18T16:52:36Z 6 months, 6 days ago 1 http://www.itbusinessedge.com/cm/message/1379?tstart=0#1379 A daunting question limited to only your budget! As Dave stated there are many RAID configurations. However, in my current situation we use RAID 1 and RAID 5. The RAID 1 is used for the host operating system. Where the RAID 5 is configured for the Mon, 18 May 2009 12:21:32 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1379?tstart=0#1379 2009-05-18T12:21:32Z 6 months, 6 days ago http://www.itbusinessedge.com/cm/message/1378?tstart=0#1378 Well Dave - I don't think any hospital has a maintenance window larger than 30 minuters, if that. Personally I have never worked in a hospital or medical facility so I am just guessing. However, the cost must always be justified to allow the likes of Mon, 18 May 2009 12:15:41 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1378?tstart=0#1378 2009-05-18T12:15:41Z 6 months, 6 days ago http://www.itbusinessedge.com/cm/message/1377?tstart=0#1377 Coming from more of a development background, revolving around database back ends, I would choose RAID 5+1 to host and protect my data.  With RAID 5+1 I get the benefits of the read speed of the multiple disk heads reading multiple pieces of information Mon, 18 May 2009 02:30:39 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1377?tstart=0#1377 2009-05-18T02:30:39Z 6 months, 1 week ago 3 http://www.itbusinessedge.com/cm/message/1372?tstart=0#1372 "There are many RAID strategies on the market today. RAID 1 and 5 still remain the most popular. If you had to choose one to protect your data, what would you choose and why?" Thu, 14 May 2009 17:16:23 GMT webadmin@itbusinessedge.com http://www.itbusinessedge.com/cm/message/1372?tstart=0#1372 2009-05-14T17:16:23Z 6 months, 1 week ago 17