@gcpeters4 Hi! You could use DNS round robin but it's 50/50 if it works for you. Just put ldap://domain.x.y in and try.

I could reproduce a bug: cloning a VDI (fast and slow) from SR-1 to SR-2 does not work.
I got a pool, current qcow2 (xcp-ng-testing,xcp-ng-candidates), a template (vm), two SR attached via FC HBA, everything else works fine.

	
id	"0moocnjj4-jmge69z174"
properties	
method	"vm.create"
params	
acls	[]
clone	false
existingDisks	
0	
name_label	"xcpwin-vm-200.lab.testing.company.net C"
name_description	"Created by XO"
size	64424509440
$SR	"e69a6183-dc17-5b0e-0794-50ee8f57c521"
name_label	"xcpwin-vm-200.lab.testing.company.net"
template	"671e59e0-f59d-fd96-7426-9886ad9b8ee3"
VDIs	[]
VIFs	
0	
network	"261a821c-a373-ba36-2c44-487ed0e1a202"
allowedIpv4Addresses	[]
allowedIpv6Addresses	[]
CPUs	4
cpusMax	4
cpuWeight	null
cpuCap	null
name_description	"Test VM"
memory	4294967296
bootAfterCreate	true
copyHostBiosStrings	false
createVtpm	false
destroyCloudConfigVdiAfterBoot	false
secureBoot	false
share	false
coreOs	false
tags	[]
hvmBootFirmware	"uefi"
name	"API call: vm.create"
userId	"5f5f1e9c-c928-4898-ab88-62b201698476"
type	"api.call"
start	1777726828192
status	"failure"
updatedAt	1777727473136
end	1777727473136
result	
code	"INTERNAL_ERROR"
params	
0	"Storage_error ([S(Internal_error);S(Storage_error ([S(Migration_preparation_failure);S(Storage_error ([S(Backend_error);[S(SR_BACKEND_FAILURE_1200);[S();S(list index out of range);S()]]]))]))])"
task	
uuid	"cc16d4ba-ce10-58ef-10c0-808872ec30ca"
name_label	"Async.VDI.pool_migrate"
name_description	""
allowed_operations	[]
current_operations	{}
created	"20260502T13:08:44Z"
finished	"20260502T13:10:25Z"
status	"failure"
resident_on	"OpaqueRef:6cac1d11-e91e-5288-8ec8-3d84e6288952"
progress	1
type	"<none/>"
result	""
error_info	
0	"INTERNAL_ERROR"
1	"Storage_error ([S(Internal_error);S(Storage_error ([S(Migration_preparation_failure);S(Storage_error ([S(Backend_error);[S(SR_BACKEND_FAILURE_1200);[S();S(list index out of range);S()]]]))]))])"
other_config	{}
subtask_of	"OpaqueRef:NULL"
subtasks	[]
backtrace	"(((process xapi)(filename ocaml/xapi/xapi_vm_migrate.ml)(line 1815))((process xapi)(filename ocaml/libs/xapi-stdext/lib/xapi-stdext-pervasives/pervasiveext.ml)(line 24))((process xapi)(filename ocaml/libs/xapi-stdext/lib/xapi-stdext-pervasives/pervasiveext.ml)(line 39))((process xapi)(filename ocaml/xapi/xapi_vm_migrate.ml)(line 2105))((process xapi)(filename ocaml/libs/xapi-stdext/lib/xapi-stdext-pervasives/pervasiveext.ml)(line 24))((process xapi)(filename ocaml/libs/xapi-stdext/lib/xapi-stdext-pervasives/pervasiveext.ml)(line 39))((process xapi)(filename ocaml/xapi/xapi_vm_migrate.ml)(line 2095))((process xapi)(filename ocaml/xapi/message_forwarding.ml)(line 141))((process xapi)(filename ocaml/libs/xapi-stdext/lib/xapi-stdext-pervasives/pervasiveext.ml)(line 24))((process xapi)(filename ocaml/libs/xapi-stdext/lib/xapi-stdext-pervasives/pervasiveext.ml)(line 39))((process xapi)(filename ocaml/libs/xapi-stdext/lib/xapi-stdext-pervasives/pervasiveext.ml)(line 24))((process xapi)(filename ocaml/libs/xapi-stdext/lib/xapi-stdext-pervasives/pervasiveext.ml)(line 39))((process xapi)(filename ocaml/xapi/rbac.ml)(line 228))((process xapi)(filename ocaml/xapi/rbac.ml)(line 238))((process xapi)(filename ocaml/xapi/server_helpers.ml)(line 78)))"
message	"INTERNAL_ERROR(Storage_error ([S(Internal_error);S(Storage_error ([S(Migration_preparation_failure);S(Storage_error ([S(Backend_error);[S(SR_BACKEND_FAILURE_1200);[S();S(list index out of range);S()]]]))]))]))"
name	"XapiError"
stack	"XapiError: INTERNAL_ERROR(Storage_error ([S(Internal_error);S(Storage_error ([S(Migration_preparation_failure);S(Storage_error ([S(Backend_error);[S(SR_BACKEND_FAILURE_1200);[S();S(list index out of range);S()]]]))]))]))\n    at Function.wrap (file:///usr/local/lib/node_modules/xo-server/node_modules/xen-api/_XapiError.mjs:16:12)\n    at default (file:///usr/local/lib/node_modules/xo-server/node_modules/xen-api/_getTaskResult.mjs:13:29)\n    at Xapi._addRecordToCache (file:///usr/local/lib/node_modules/xo-server/node_modules/xen-api/index.mjs:1078:24)\n    at file:///usr/local/lib/node_modules/xo-server/node_modules/xen-api/index.mjs:1112:14\n    at Array.forEach (<anonymous>)\n    at Xapi._processEvents (file:///usr/local/lib/node_modules/xo-server/node_modules/xen-api/index.mjs:1102:12)\n    at Xapi._watchEvents (file:///usr/local/lib/node_modules/xo-server/node_modules/xen-api/index.mjs:1275:14)"