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Dell Midrange Storage Solutions Design 2023 > Powerstore Whitepapers > Flashcards

Powerstore Whitepapers Flashcards

1
Q

What are the maximum storage drives in a Powerstore 500T?

A

97

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2
Q

What are the maximum storage drives in a Powerstore 1200T or higher?

A

93

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3
Q

What are the 4 port cards supported by Powerstore 500T?

A

25/10 GbE optical/SFP+ and Twinax

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4
Q

What are the 4 port cards supported by Powerstore 1200T or higher?

A

25/10 GbE optical/SFP+ and Twinax / 10GbE BASE-T

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5
Q

What is the 2 port card included on Powerstore 500T?

A

10GbE optical/SFP+

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6
Q

What is the 2 port card included on Powerstore 1200T or higher?

A

100GbE QSFP

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7
Q

What are the optional 2 port IO Modules supported by Powerstore 500T?

A

32/16/8/4Gb FC

25/10GbE optical/SFP+
10GbE BASE-T

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8
Q

What are ports ports 2 and 3 for on the Powerstore 500T 4 port card?

A

NVMe expansion enclosures

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9
Q

What is the 2 port card reserved for on Powerstore 1200T and higher?

A

back-end connectivity to NVMe expansion enclosure

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10
Q

What are the optional 2 port IO Modules supported by Powerstore 1200T or higher?

A

32/16/8/4Gb FC

100GbE optical QSFP
25/10GbE optical/SFP+
10GbE BASE-T

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11
Q

How many optional 2 port IO modules are included when adding them to Powerstore?

A

2 per node

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12
Q

What is the 1GbE BASE-T ports used for in Powerstore?

A

service/management

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13
Q

What is the minimum drive count for Powerstore 3200Q?

A

11 NVMe QLC drives

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14
Q

What is the minimum drive count for Powerstore T models?

A

6 NVMe SSD/SCM drives

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15
Q

What is not supported by all SCM Powerstore base enclosures?

A

NVMe expansion enclosures

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16
Q

What is the M.2 SATA drives used for in Powerstore?

A

primary boot device for each node

stores base OS/log files/general operations

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17
Q

What is the function of the BBU in Powerstore 1200T and higher?

A

provides power to the NVRAM drive slots

allows NVRAM drives to vault their data in event of power failure

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18
Q

What is the 2 port card necessary for in Powerstore 1200T and higher?

A

to connect NVMe expansion enclosures

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19
Q

What is true about the optional IO modules in Powerstore?

A

for the two nodes in the base enclosure the IO modules must match between them

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20
Q

What power is supported by Powerstore models 1200-9200T?

A

1800/2100W (1200-5200T)
2100W (9200T only)

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21
Q

What is important to know about power configurations with Powerstore?

A

1800PSU can’t work in low-line power environments

can instead use 2100PSU w/ step-up transformer

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22
Q

What is the difference in M.2 SATA drives in Powerstore 500T?

A

only has one instead of 2

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23
Q

What is the function of the BBU in Powerstore 500T?

A

allows node to encrypt and backup dirty cache data from system DRAM to internal M.2

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24
Q

What power is supported by Powerstore models 500T?

A

1450W PSU

either high-line or low-line

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25
What the minimum IO module/network is necessary to run NVMe/TCP?
25GbE
26
What the minimum IO module/network is necessary to run NVMe/FC?
32Gb
27
What is the recommendation for host connectivity in a Powerstore cluster?
any host connected to a Powerstore cluster should have equivalent connectivity to all appliances in a cluster each host should have at least two paths to each Powerstore node (4 paths to appliance - no more than 8 paths to a volume)
28
What is true about NVMe/TCP connectivity in Powerstore?
can be enabled on the same storage network as iSCSI or different storage networks to isolate iSCSI from NVMe/TCP traffic use different physical ports for NAS and NVMe/TCP if in unified mode
29
What is FSN (fail safe networking) in Powerstore?
high availability feature that enables configuring ports in a primary/backup configuration for file interfaces
30
What is dynamic node affinity in Powerstore?
block storage resources will be dynamically rebalanced between nodes to maintain relatively consistent utilization and performance between both nodes vVols also become supported by dynamic node affinity in 4.0
31
What is the default performance policy for block resources in Powerstore?
medium - does not have any impact on system behavior unless some volumes have been set to low and others to high/medium will dedicate less resources to low performance labeled volumed in times of high use
32
What were the QoS features introduced in Powerstore 4.0?
I/O limit rules for volumes and volume groups
33
What are the supported resources for native synchronous and asynchronous replication in Powerstore?
volumes volume groups thin clones NAS Servers file systems
34
What is the network used for native synchronous and asynchronous replication in Powerstore?
iSCSI or Dell optimized TCP based protocols
35
What is the latency requirements for native synchronous replication in Powerstore?
less than 5ms
36
What is metro volume replication in Powerstore?
synchronous replication of spanned block storage volumes exclusively for VMWare VMFS datastores
37
What was added to metro volume replication in Powerstore 4.0?
volume group support Windows and Linux support
38
What is the secure snapshot setting in Powerstore?
create snapshots for volumes and volume groups protects snapshot from deletion until the retention period expires
39
What is Powerstore Storage Direct?
users can back up volumes and volume groups directly to a DD running on premise or in the cloud eliminates need for backup hosts
40
What was the network feature of Powerstore 4.0 added?
allows users to create multiple storage networks with defined purposes
41
How do writes work in Powerstore 1200-9200T?
IO enters node A and saved within node DRAM memory and analyzed to determine what type of IO it is information stored within write cache in Node DRAM memory copy of write written to NVRAM drives information (token) passed between the nodes to update the peer that a new write was received IO acknowledgement completed to host - data passed through dedupe and compression at a later time
42
How do writes work in Powerstore 500T?
write enters node A and information stored within node DRAM memory information mirrored to peer Node DRAM memory host acknowledged and data passed through dedupe/compression at a later time
43
When does dedupe and compression occur in Powerstore?
as data is copied from DRAM memory write cache to the data drives within the system
44
How is data stored in backend drives in Powerstore?
full stripe writes
45
How is the data path through the data reduction algorithm in Powerstore?
first passes through common pattern detection (zeros) than passed through dedupe algorithm creates 4KB block fingerprint of data - compared to other fingerprints to see if any repeats data compressed and placed into full stripe width in backend storage
46
What is the role of metadata in the data reduction algorithm in Powerstore?
tells the system how to recreate or locate the data for an address
47
What was the new compression feature added to Powerstore 4.0?
compression algorithm has been enhanced to allow multiple blocks of data to be compressed together
48
Where is space savings information available in Powerstore?
cluster, appliance and drive level
49
What are the data reduction viewing metrics that were added to Powerstore Manager after Powerstore 4.0?
Overall DRR Reducible DRR Unreducible Data
50
What is Overall DRR in Powerstore Manager?
ration of space which would have been taken if dedupe and compression are not applied to the physical space
51
What is Reducible DRR in Powerstore Manager?
DRR for the reducible data in the cluster/appliance/drive
52
What is Unreducible Data in Powerstore Manager?
amount of data written that could not be reduced by Powerstore
53
What replication feature was added to Powerstore during 4.0?
synchronous block AND file replication
54
What file resources are supported for native migration in Powerstore?
NFS/SMB file systems supports VNX2/Unity as source systems
55
What block resources are supported for native migration in Powerstore?
LUNs/volumes thick/thin clones consistency groups VMFS datastores (EqualLogic only) Windows RDM (EqualLogic only)
56
What is LVM migration in Powerstore?
supports block devices that have been presented to Linux hosts as logical devices can be performed over iSCSI or FC
57
What are the file migration options in Powerstore?
EMCopy Robocopy Rsync Datadobi
58
How are new NAS Servers assigned in Powerstore?
round-robin across available nodes
59
Where are all NAS server interfaces configured?
first two bonded ports on 4 port card use VTL w/ LACP to maximum bandwidth on these ports
60
How much data is allocated for metadata in Powerstore file systems?
1.5GB
61
What are user quotas in Powerstore file data?
limit the amount of space a user can consume on a file system
62
What are tree quotas in Powerstore file data?
limit the max size of a directory on a file system
63
What type of file backup does Powerstore support?
three way NDMP transfers both metadata and backup data over network
64
What additional protection feature does Powerstore have for file data protection?
FLR
65
What are the latency independent replication options in Powerstore?
Block asynchronous vVol asynchronous File asynchronous
66
What are the latency dependent replication options in Powerstore?
Block Metro synchronous Block synchronous File synchronous
67
What is the replication limit for Powerstore?
supports up to 8 remote system pairs
68
Where is replication typically performed on Powerstore?
over Ethernet ports
69
What is required for the network if you're doing file replication in Powerstore?
configure an additional file mobility network
70
What is a limitation to synchronous metro replication in Powerstore?
limited to block only
71
What are the replication topologies for native replication on Powerstore?
one-directional bi-directional one-to-many many-to-one
72
What is the host connectivity support for metro volumes?
ESXi FC or iSCSI
73
What kind of replication is enabled when using metro volumes?
synchronous block bi-directional replication
74
What change was made to metro volumes after Powerstore 4.0?
not just VMWare but now supports Microsoft and Linux as well
75
What is the parity level required for Powerstore 3200Q DRE?
dual drive parity
76
What is the only drive size for Powerstore 3200Q?
15.36TB QLC SSD
77
What is distributed sparing in DRE?
spare space distributed across entire appliance - small chunk of data reserved in each drive single drive's worth of spare space reserved for every resiliency set in an appliance
78
What makes distributed sparing more efficient than traditional hot spares?
when a drive fails only the portion of the drive which has data written will be rebuilt spares only consume the required space
79
What are resiliency sets in DRE?
failure domains within a set of drives max of 25 drives in a set for single drive failure and 50 drives for dual drive failure

Dell Midrange Storage Solutions Design 2023 (18 decks)

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