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Why is copy support via SCP failing on a VDX platform?

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TitleWhy is copy support via SCP failing on a VDX platform?
Question

Copy support operation is failing on VDX platform via SCP.

From RAS log, it errors outwith the following messages:

2016/07/08-05:37:53:129343, [SS-5001], 29741/0, SW/0 | Active, ERROR, VDX6740, Copy support's file transfer operation aborted error:0xffffffff cmd:module:RAS ip:172.30.0.144 rdir:supportsave/ slot:0., supportSave.c, line: 1230, comp:supportSave, ltime:2016/07/08-05:37:53:129077

2016/07/08-05:37:53:130262, [SS-1001], 29742/27079, SW/0 | Active, WARNING, VDX6740, Copy support upload operation has been aborted., supportSave.c, line: 1235, comp:supportSave, ltime:2016/07/08-05:37:53:129244

SCP server log errors outwith the following messages:

Please note server back end is performing sftp

BEC-VCS1-R01-132# copy support scp host 172.30.0.144 user minion

Value for 'directory' (<Copy support target directory>): /supportsave/

Password: ******

Jul 12 09:42:15 gurney-Jeronimo95dhcp sshd[26301]: Accepted password for minion from 172.30.0.132 port 53360 ssh2

Jul 12 09:42:15 gurney-Jeronimo95dhcp sshd[26306]: subsystem request for sftp

Jul 12 09:42:15 gurney-Jeronimo95dhcp sshd[26306]: subsystem request for sftp failed, subsystem not found
Environment
Answer
Please perform steps below to troubleshoot this issue:

1) Copy support failed
2) Check the host IP address, user/password, and the permission and space left on the SCP server remote directory
3) Verify if password authentication is enabled under /etc/ssh/sshd_config file on the SCP server
4)
# To disable tunneled clear text passwords, change to no here:
PasswordAuthentication yes

Additional notes

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