This post is more than 5 years old
28 Posts
0
15944
MTBF
In "Information Storage & Management v2 " book, there is question regarding calculating MTBF (mean time between failure) in Lesson 10 Backup and Archive. Can anyone please provide answer and brief solution to that question ? It is really confusing to me.
KEHutchinson
633 Posts
0
June 24th, 2016 12:00
Hi Alok,
This answer comes from SomuG :
AVAILABILITY
· System needs to be operational from 8am to 5pm = 9 hrs per day and for 5 days it is 45 hrs
· Non availability (Mon to Friday) (ie) any time of the day the system was not available during 8am to 5pm
o Monday 8-11 = 3 hrs
o Tuesday = 0 hr
o Wednesday = 1 hrs (only 4PM to 5PM)
o Thursday = 0 (since failure was outside operational hours)
o Friday 1-2 = 1 hr
· Total time not available for the operation= 3+0+1+0+1 = 5 hrs
· Availability of the system = (45-5)/45*100 = 88.9%
MTBF (MEAN TIME BETWEEN FAILURE)
· Total up time / number of breakdowns that affected the up time (ie) during operational time (8am-5pm)
· =40/3 = 13.33 hrs
MTTR (MEAN TIME TO REPAIR)
· Total down time / number of breakdowns during operational time
· 5/3 = 1.67hr
KEHutchinson
633 Posts
0
June 23rd, 2016 05:00
Hi Alok,
Can you share the question specifically?
Alok1947
28 Posts
0
June 23rd, 2016 11:00
KEHutchinson
633 Posts
0
June 23rd, 2016 12:00
Alok, I'm looking at my copy of the ISM v2 book, and I don't see that question anywhere. What page is it on?
Alok1947
28 Posts
0
June 23rd, 2016 15:00
HI Kate,
it's on page no 222, question no .2. In that question, they have asked for availability of component 2 only. But for my better understanding, please show me the calculation for MTBF and MTTR too.
Alok1947
28 Posts
0
June 24th, 2016 13:00
Hi Kate,
This is really helpful. Thanks
bhupendrachaudhari
7 Posts
0
August 30th, 2020 03:00
Sir,
We have supplied 1 R630 and 4 R730 to our client BSNL .
Customer want to know documenration/calculation for MTBF/MTTR
Will you pl. guide
NSDame
Community Manager
Community Manager
•
478 Posts
0
August 31st, 2020 05:00
Hello bhupendrachaudhari,
Please refer this thread..
https://www.dell.com/community/PowerEdge-Hardware-General/Re-Mean-Time-Between-Failure/m-p/7682460#M65899
Thank you for your post.
Suman1101
1 Message
0
September 7th, 2020 04:00
Great information here. Thank you!