Free E20-855 Exam Dumps Preview

The customer is implementing a full-mesh fabric with four 9506 MDS Connectrix Directors. Each director in the mesh will be connected with dual connection port channels to a neighboring switch, giving the fabric a cost of 250 between each director. The hosts in the environment must pass through two directors to access storage, with an aggregate link cost from the host to the storage of 500.

What happens in this environment if a link fails in a port-channel group?

Customer added three new servers to an existing SAN consisting of two fabrics. Each fabric consists of two switches with two ISLs. This change negatively impacted performance. Throughput is as follows: 20MB/s on Host HBAs at 4K block size 50MB/s on Symmetrix on the FA ports 60MB/s on each ISL port The physical disks are 80% utilized but with 100% cache-hit ratio.

What should the customer do to improve performance?

Click the Exhibit button. The customer is collapsing from mirrored core/edge to mirrored cores as shown in the diagram. As a result of collapsing the fabric the AIX server took a long time to boot and the volume groups will not mount.

What should be done to avoid the extended boot time and the volume groups not mounting?

Click the Exhibit button. The customer in the diagram is displaying a fabric extended using iFCP. Only the local switch is displayed. However, the hosts connected to the remote location are working fine.

What is the reason for this?

There are 12 Solaris hosts connected to two fabrics and a DMX2000. All the hosts are dual-pathed using Emulex HBAs. All 12 HBAs in each fabric are connected and zoned to one FA port. Each host is doing 2000 IOPS. Each I/O size is 64KB.

Two of the hosts are receiving the following error in their /var/adm/ messages file: SCSI transport failed: reason 'timeout': retrying command What do you advise the customer to do?

Your customer wants to utilize Jumbo Frames in their new multi-protocol SAN, but is dissatisfied with the lack of overall improvement after implementation. You want to ensure MTUs larger than the Ethernet standard of 1500 bytes will be beneficial.

Which three [3] conditions must be met?

What are two [2] benefits of configuring an MDS switch to use TACACS+

Your customer is reconfiguring the SAN. They are using an MDS switch in fabric A and a B-series switch in fabric B. They need to share resources across the fabrics. On the weekend a merge of the fabrics was done. Now they can not connect from fabric A to fabric B. Unique Domain IDs exist. E_D_TOV and R_A_TOV are equal and Interop mode is set on both fabrics.

What must you do to make the two fabrics merge?

Click the Exhibit button. Six I/Os arrive at disk director together. The inter-arrival time is 0. The disk controller is servicing one I/O at a time. The exhibit displays information relevant to average response time.

What is the average response time?

A customer has an application that requires high levels of security. They have two dedicated ports assigned on the Symmetrix. They have two host connections into a single M-series switch.

Which software would you apply to prevent unauthorized access?

Click the Exhibit button. The customer added a new iSCSI server to the MP-1620M. They can not access the storage array on IP address 10.5.19.1. The customer's network is setup for Fast Ethernet.
Please see exhibit.

What is the issue?

Your customer has two SAN islands built with two ED64Ms in each fabric. Due to the end of the lease these are being replaced with ED-12000Bs.

What are the steps to migrate the fabrics without recreating the zones?

The customer is preparing the B-series SAN environment to eliminate the presence of edge SAN devices.
The administrator has manipulated the Core-PID format on all edge switches to be of unique value.
Without realizing the impact of change, the attached HP-UX servers have subsequently lost access to their SAN devices.

What has happened?

A customer has merged four DS-32M2s to form a full mesh fabric which includes 20 dual-pathed hosts and eight storage ports. Two ISLs are configured between each switch. The ISLs are currently 80% utilized.
The customer will be adding 10 dual-pathed Windows 2k3 Servers in the next two weeks.

What is recommended to prevent performance problems on the SAN?

The customer has 500 identical servers that need to be allocated the same amount of storage space and storage protection. This task is estimated to take 100 man hours.

Which ControlCenter Storage Provisioning Services steps will reduce the time it takes to provision storage to 10 man hours?

Your customer is reconfiguring the SAN. They are using an MDS switch in fabric A and a B-series switch in fabric B. They need to share resources across the fabrics. On the weekend a merge of the fabrics was done. Now they can not connect from fabric A to fabric B. Unique Domain IDs exist. E_D_TOV and R_A_TOV are equal and Interop mode is set on both fabrics.

What must you do to make the two fabrics merge?

Which security IP protocol would you implement if you required host-switch authentication?

Click the Exhibit button. The customer has just created an iSCSI environment (see diagram). All users are now experiencing poor performance.

Which option will improve performance?