[ Hard Disk ]
1. Explain the
inner structure or layout of a Hard disk ?
2. Explain
what is meant by CHS ?
3. What is
Cylinder,Head,Sector,Track,clusters ?
4. What is LBA
?
5. Name some
of the hard disk vendors ? What are the specifications of a hard disk you
consider when you are working as storage admin or storage tester ?
6. Explain
CPACS( Capacity,Performance,Availability,Cost,Scalability) importance in
Storage ?
7. Name some
of the Storage components ?
8. Explain
each of below Storage components
Hosts [ Servers ]
Internetworking Components
Network Devices [ Switches , Hubs ]
Cable Connectivity
Storage Subsystems
Hard drives
Tape drives
JBOD [ Just a Bunch Of Disks ]
Enclosures
Arrays
NAS [ Network attached Storage ]
SAN [ Storage Area Network ]
9. Explain the
difference between DAS-NAS-SAN ?
10.Explain
below standards or Protocol interfaces ?
IDE
: Integrated Device Electronics
ATA
: Advanced Technology Attachment
SATA : Serial ATA
SCSI
: Small Computer System Interface
SAS
: Serial attached SCSI
FC : Fibre Channel
ISCSI : SCSI over IP
11. Sort above
mentioned protocols interms of Performance
and Cost ?
[ MAGNETIC TAPE ]
12. What is a
magnetic tape ?
13. Mention
different types of magnetic tapes ?
[ STORAGE OPERATING SYSTEMS ]
14. Mention
some of the major operating systems which you have worked on with respect to
Storage experience ?
15. Mention
different processor types & latest processors what you have used in your
work ?
16. Why we
need to be aware of processor & OS combinations ?
17. What
difference a 64 bit Windows 2003 Server from normal 32 bit ? Which processors
are 32 bit & 64 bit from Intel ?
[
SCSI ]
18. What was
the name for SCSI before it was standardised by ANSI ?
19. Why SCSI
had very good market share compared to ATA/IDE/PATA ?
20. Whats
Ultra1,Ultra2,Ultra3 in SCSI ?
21. Mention
the difference between Narrow & Wide SCSI ?
22. What is
the maximum no. of devices supported in narrow,wide SCSI?
23.I have a
SCSI peripheral but I do not know if it has the single-ended, HVD or LVD
interface. Is there an easy way to tell?
24. Explain SE
?
25. What is
LVD & HVD ?
26.
Differentiate between SE, LVD, HVD ?
27. Mention
the advantages of SCSI ?
28. WHat is
meant by Hot plug or Hot swap ?
29. Among
IDE/ATA, SCSI, SAS, SATA , FC which ones support Hot plug/Hot swap ?
30. What is
NCQ ?
31. What is
TCQ ?
32. What is
SCSI ID & why is it important ?
33. HOw SCSI
id is configured for a SCSI hard disk drive (HDD) ?
34. Mention
device types supported in SCSI 3 ?
35. Mention device
types supported in SCSI 2 ?
36. Mention
device types supported in SCSI 1 ?
37. Give
examples for each of the below :
Block devices (SBC)
Stream devices (SSC)
Graphic devices (SGC)
Medium changer devices (SMC)
RAID Controllers (SCC)
CD-ROMS (MMC)
38. Explain
connector types & their no. of pins in SCSI ?
39. What is
the maximum length of cable permitted in SCSI ?
40. What is
daisy chaining ?
41. What are
the different types of SCSI cards ?
42. Mention
different SCSI phases ?
43. Explain
what happens in each of the below phases :
arbitration
selection
message out
message in
command data out
data in
status
bus free
44. What is a
terminator & why is it needed in SCSI ?
45. Mention
some SCSI commands ?
46. Explain
each of below
-Test unit ready:
-Inquiry:
-Request sense:
-Start/Stop unit:
-Read capacity:
-Format unit
-Read (four variants)
-Write (four variants)
-Log sense:
-Mode sense:
-Mode select:
47. What is
SCSI arbitration and selection ? How is this resolved ?
48. Name some
of the vendors of SCSI HBA,SCSI hard drives ?
49. Does SCSI
work in both directions (is it a bidirectional bus ) ?
50. What is
"multimode LVD" or LVD/MSE SCSI?
51. What are
the benefits of LVD SCSI?
52. Is LVD
SCSI backward compatible?
53. What is Ultra160
or U160 SCSI?
54. I have
heard of U160/m SCSI. What is it?
55. Is
Ultra160 SCSI backward compatible?
56. Is Ultra
160 SCSI better than fibre channel?
57. Is Ultra
160 SCSI better than EIDE?
58. What is
Fast-20 [or Fast-40 or Fast-80] SCSI?
59. Can I
connect an Ultra 2 Wide (LVD) disk to an Ultra Wide adapter?
60. What is
Double Transition clocking?
61. What is
"Domain Validation"?
62. What is
CRC?
63. I recently
purchased a new SCSI drive with an SCA (or SCA-2) connector. How do I connect
this to my cabled SCSI system?
64. What is
QAS?
65. What is
SCSI "packetization" (also called information units)?
66. What are
the five optional features of Ultra 160 (Ultra 3) SCSI?
67. All the
new hard disk drives have the LVD/MSE interface. Can I use them on a Narrow
single-ended SCSI bus?
68. I know I
can place a LVD/MSE peripheral on a single-ended bus, but the LVD interface is
Wide (34 pair cables) and the single-ended bus is Narrow (25 pair cables). Any
problems here?
69. Can I
attach Narrow devices to a Wide SCSI bus?
70. I have
heard the term "idc" applied to internal SCSI ribbon cables. What
does it mean?
71. Can I
attach Wide peripherals to a Narrow SCSI bus?
72. I note
that in several of your FAQs you recommend the use of 68-pin to 50-pin
adapters. Aren't they "impedance lumps" in the SCSI transmission line
that can cause reflections and associated problems?
73. I had a
problem with my SCSI bus. It was much slower than I thought it should be. When
I used a new SCSI cable that was six feet longer than the one it replaced, the
system performance returned to what I think it should be. Why?
74. How can I
connect a HVD device to my single-ended bus? [or vice versa]
75. How can I
connect a HVD device to my LVD bus?
76. I have a
LVD/MSE bus with several multimode peripherals, and I want to add a
single-ended peripheral to it. I know that LVD/MSE is backward compatible
through the single-ended interface, but when I add the single-ended peripheral,
the LVD peripherals really slow down. Can something be done to resolve this.
77. How can I
connect a LVD peripheral to my single-ended SCSI bus?
78. Why does
my LVD/MSE bus slow down when I connect even one single-ended peripheral?
79. I
connected what I believed to be a single-ended peripheral to my multimode
(LVD/MSE) bus, thinking the bus would switch to the single-ended mode and
operate, although at a slower speed. The bus simply shut down. What happened?
80. How can I
connect a LVD peripheral to an HVD SCSI bus?
81. What are
LUNs? why are they important ?
82. Can I have
more than one computer on my SCSI bus?
83. What is
the difference between SCSI and IDE (or EIDE or ATAPI)?
84. Among SCSI
or IDE which is better for enterprise storage
and for desktop ?
85. Will my
single-ended to differential converter also do differential to single-ended
conversion?
86.
terminators. Where should they be placed?
87. What is
the difference between passive and active terminators?
88. Should I
use passive or active terminators?
89. I need a
terminator for my SCSI bus consisting of a number of HVD disk drives. I do not
need a pass-through HVD terminator, but that is all I can find. Can I use it
for the terminator at the end of this HVD bus?
90. How can I
tell if an unmarked terminator is SE or differential?
[ SAN Related Interview Questions ]
91. What is
LUN masking?
92. What is
SAN zoning?
93. What are
different types of zoning & how do they differ ?
94. What are
hard and soft zoning? What is port zoning ? What is WWN zoning ?
95. What is a
World Wide Name (WWN) & why is it important ?
96. In a FC
HBA how can i find WWN ?
97. How are
iSCSI, iFCP and FCIP secured over IP networks?
98. What are
the differences between FC & iSCSI ?
99. Mention
some of the issues you faced while working on SAN & how did you resolve
them ?
100.What was
the most challenging troubleshooting you did while working on SAN. Please give
the steps & commands used ?